Quanzhou Henglida Tel-Equipment Co., Ltd. is located in Nanan Xiamei Industrial Zone. Our company is a comprehensive hi-tech group company integrating scientific research, production and sale. We professionally produce and distribute Henglida brand products such as 2 way radio and its battery, charger and other telecommunication equipment.
People Oriented is our tenet. We own a qualified scientific research team who has been engaged in R&D, production, engineering and servicing for many years. 80 percent of them are telecommunication-related specialty undergraduates who have been systematically and across-the-aboard trained. We are provided with technical advantage on system integration, engineering network building, products R&D, and wireless digital transmission. We are leading the way in the industry with abundant experience and strong technologies strength.
We have exquisite plant area and modern workshops, and we also possess advanced instruments used in checking, inner resistor testing and electronic load testing. The complete catalogues of products series are used extensively in post telecommunication office, railway, public security, oil, fire fighting, flood prevention, property management, transportation and other departments. Our products sell well around the country and are exported throughout the world.
Taking possession of market by quality and striving for customers by honesty are our tenet. Providing the best services for consumers and meeting their demands constantly are our ultimate goal. We sincerely welcome clients from at home and abroad to negotiate and cooperate.
Quanzhou Henglida Tel-Equipment Co., Ltd. is determined to strive to revitalize national industry. Our aim is that “creating brand enterprise, setting up top visualized, and making our company become a manufacturer with advanced technologies, scientific management, advanced equipment, and exquisite service”.
2012年12月26日星期三
2 Way Radio – Shenzhen Nicely Electronic Co., Ltd.
Founded in 1999, Shenzhen Nicely Electronic Co., Ltd. has gained an excellent reputation in the global market as a professional and experienced manufacturer. Located in Shenzhen, our company integrates the research, development and manufacture of a large collection of 2 way radios, mini telephones, calculators, VCDs, multimedia speakers and electronic pets.
We have more than 30 senior engineers and supervisors, 400 workers and a strong R&D team that is constantly developing new products to meet the demands of our customers. Furthermore, as we have established a specialized production facility, we can assure both high quality products and our best service.
If you are interested in any of our products, or are searching for a supplier to fill your OEM or ODM order, please contact us to discuss your requirements.
We have more than 30 senior engineers and supervisors, 400 workers and a strong R&D team that is constantly developing new products to meet the demands of our customers. Furthermore, as we have established a specialized production facility, we can assure both high quality products and our best service.
If you are interested in any of our products, or are searching for a supplier to fill your OEM or ODM order, please contact us to discuss your requirements.
2 Way Radio – Guangzhou Hai Na Bai Chuan Electronics Industrial Co., Ltd.
we are professional exporter establish in 1999. That our professional experience, strict quality control process and competitive prices enable us to enjoy stable orders from overseas customers.
we have set up Guangzhou Hai Na Bai Chuan Electronics Industrial Co., Ltd. which is professional manufacturers and exporters, located in Guangzhou City, Guangdong Province, China. Advanced automatic silkscreen equipments, and plastic injection machines assure all the production on time with satisfactory results
In order to fully satisfy our clients’ requirements, we have begun to provide ODM services for our customers and have placed a large amount of emphasis on quality control and R&D since 2002.
Customers’ satisfaction is always our goal, and continuous improvement is always our strategy. With rich experience in exporting business and advantageous position, we are servicing many international customers from all over the world. By providing unique products with high quality and value added services, we are gaining a greater market share.
In HNBC Company, people are our most valuable assets. We believe that only competent people can make things happen. In pursue of this belief, we constantly upgrade our people’s qualities.
Now our products are covering wide varieties of areas including USB, timers (digital timer and mechanical timers), clocks (digital clock, quartz clock, temperature clock, pen holder clock, photo frame clock), 2 way radios, calculators, pedometers, solar related products, else electronic products and promotional gifts .
We are looking forward to becoming your supplying partner in the near future.
we have set up Guangzhou Hai Na Bai Chuan Electronics Industrial Co., Ltd. which is professional manufacturers and exporters, located in Guangzhou City, Guangdong Province, China. Advanced automatic silkscreen equipments, and plastic injection machines assure all the production on time with satisfactory results
In order to fully satisfy our clients’ requirements, we have begun to provide ODM services for our customers and have placed a large amount of emphasis on quality control and R&D since 2002.
Customers’ satisfaction is always our goal, and continuous improvement is always our strategy. With rich experience in exporting business and advantageous position, we are servicing many international customers from all over the world. By providing unique products with high quality and value added services, we are gaining a greater market share.
In HNBC Company, people are our most valuable assets. We believe that only competent people can make things happen. In pursue of this belief, we constantly upgrade our people’s qualities.
Now our products are covering wide varieties of areas including USB, timers (digital timer and mechanical timers), clocks (digital clock, quartz clock, temperature clock, pen holder clock, photo frame clock), 2 way radios, calculators, pedometers, solar related products, else electronic products and promotional gifts .
We are looking forward to becoming your supplying partner in the near future.
2 Way Radio – Guangzhou Ecome Trade Co., Ltd.
Guangzhou Etmy Co., Ltd., founded in 2008, is a manufacturer specialized in the research, development and production of walkie-talkies and 2 way radios . We are located in Guangzhou, with convenient transportation access. All of our products comply with international quality standards and are greatly appreciated in a variety of different markets throughout the world.
If you are interested in any of our products or would like to discuss a custom order, please feel free to contact us. We are looking forward to forming successful business relationships with new clients around the world in the near future.
If you are interested in any of our products or would like to discuss a custom order, please feel free to contact us. We are looking forward to forming successful business relationships with new clients around the world in the near future.
2 Way Radio – Nanan Rike Electronics Co., Ltd.
Located in China’s two-way radio town–Quanzhou, Rike Electronics Co., Ltd. was established as a modern technology enterprise integrating R&D and 2 way radio, manufacture and distribution in a rapid developing step.
Since our company was established in February 1990, we have had our advantages – production and sale integration, from original brand agent to enterprise management in workshops. Every step invariably proves the growth and development of Rike. Reformed in 2008, our company hired a group of elites with strong technical strength with good salaries and was equipped with advanced processing equipment. Our solid foundation and reformed team provide an important condition for enhancing our products and our brand value continuously.
“Explore market by technology, set foot in market by quality, win market by service” is our persistent philosophy. Whether in the past, at the present or in the future, we were providing, are providing and will provide high quality products, excellent service and good faith for a great number of clients from both at home and abroad.
Since our company was established in February 1990, we have had our advantages – production and sale integration, from original brand agent to enterprise management in workshops. Every step invariably proves the growth and development of Rike. Reformed in 2008, our company hired a group of elites with strong technical strength with good salaries and was equipped with advanced processing equipment. Our solid foundation and reformed team provide an important condition for enhancing our products and our brand value continuously.
“Explore market by technology, set foot in market by quality, win market by service” is our persistent philosophy. Whether in the past, at the present or in the future, we were providing, are providing and will provide high quality products, excellent service and good faith for a great number of clients from both at home and abroad.
2 Way Radio – Henan LiTuo Building Material Co., Ltd.
Henan LiTuo Building Material Co., Ltd. is a manufacturer of Walkie Talkies and 2 way radio & Accessories with well-equipped testing equipment and strong technical force.
With a wide range, good quality, reasonable prices and stylish designs, our products are extensively used in Communication and other industries.
Our products are widely recognized and trusted by users and can meet continuously developing economic and social needs.
We welcome new and old customers from all walks of life to contact us for future business relationships and achieving mutual success!
With a wide range, good quality, reasonable prices and stylish designs, our products are extensively used in Communication and other industries.
Our products are widely recognized and trusted by users and can meet continuously developing economic and social needs.
We welcome new and old customers from all walks of life to contact us for future business relationships and achieving mutual success!
2 Way Radio – Shenzhen ZY Electronic & Technology Co., Ltd.
ZY International Limited is a professional supplier of Mobile Repeater, GPS Tracker ,2 way radio with both product development and manufacturing capabilities. Our company was founded in September of 1999 with independent import and export rights.
Our main products include Mobile Repeater, GPS Tracker, two way radio and other related telecomunication and security products. We meet your special needs from product development to exportation. Some of our products are E-MARK certified and we strictly follow ISO9001:2000.
We take pride of our quality and integrity. We provide a variety of professional grade goods for clients to choose from, supplying top customer service and great prices. We have won a good reputation in this industry. We have dealers in many countries. Our products are seen in more than 80 countries. Also, we maintain great and long-term relationships with more than 100 wholesalers.
Our professional marketing department is made up of people who have been exploring international trade with more than 10 years’ experience. We have clear and precise marketing exploration plans. As part of the company growth, we are now sincerely looking for reputable retailers and wholesalers to help us developing new overseas markets.
Our main products include Mobile Repeater, GPS Tracker, two way radio and other related telecomunication and security products. We meet your special needs from product development to exportation. Some of our products are E-MARK certified and we strictly follow ISO9001:2000.
We take pride of our quality and integrity. We provide a variety of professional grade goods for clients to choose from, supplying top customer service and great prices. We have won a good reputation in this industry. We have dealers in many countries. Our products are seen in more than 80 countries. Also, we maintain great and long-term relationships with more than 100 wholesalers.
Our professional marketing department is made up of people who have been exploring international trade with more than 10 years’ experience. We have clear and precise marketing exploration plans. As part of the company growth, we are now sincerely looking for reputable retailers and wholesalers to help us developing new overseas markets.
2 Way Radio – Bond Telecom Co., Ltd.
Bond Telecom Co., Ltd. specializes in producing and marketing professional FM 2 way radios, with VHF, UHF, marine, CB band, mobile and portable status. We have been in this field more than 6 years.
Our main markets are South America, Asia and the Middle East. Our products have won a good reputation in those markets.
We can supply OEM and ODM services. Please feel free to contact us for further information.
Our main markets are South America, Asia and the Middle East. Our products have won a good reputation in those markets.
We can supply OEM and ODM services. Please feel free to contact us for further information.
2 Way Radio – Quanzhou Keci Exactitude Electronic Co., Ltd.
Quanzhou Keci Exactitude Electronic Co., Ltd. is a professional & hi-tech enterprise which is engaged in the research and manufacture of wireless telecommunication series of products. Since our foundation, our company never stops its hard working on the development of unlimited terminals to satisfy the customer’s requirement. With several years’ techniques and experience accumulation, our company has become a top ranking enterprise equipped with the latest technology, high class devices, perfect management, good quality products and circumspect service.
As a leading hi-tech enterprise with innovative technology, our company mainly produces high-quality 2 way radios, including accessories. Our products can be applied to many kinds of walkie-talkies and digital cluster machines. All of our products are exported to more than 50 foreign countries and areas covering Europe, Southeast Asia and the Middle East.
With modern management ideas, advanced technical skills, perfect QC management and after-sales service, our company has established a stable groundwork which will guarantee our long term development.
As a leading hi-tech enterprise with innovative technology, our company mainly produces high-quality 2 way radios, including accessories. Our products can be applied to many kinds of walkie-talkies and digital cluster machines. All of our products are exported to more than 50 foreign countries and areas covering Europe, Southeast Asia and the Middle East.
With modern management ideas, advanced technical skills, perfect QC management and after-sales service, our company has established a stable groundwork which will guarantee our long term development.
2 Way Radio – Tech-Security Electronic Technology Co., Ltd.
Tech-Security Electronic Technolog Co., Ltd was founded in 2006, developed from a professional wireless digital technology company, In year 2008 merged a wireless digital technology company which have been in the wireless technology line for 9 years. Company is headquartered in Pearl of the Orient, one of Asia’s Four Little Dragons — Hong Kong. In 2009 set up offices in the world of electronic base-Dongguan city, here with Superior geographical environment and developed transportation, close to Guangzhou and Shenzhen city. As a manufacture, the company has its own R&D, production, quality control, sales team. Maily produce and sell wireless products, such as full duplex wireless video door phone, full duplex audio doorbell, full duplex video walkie talkie, full duplex video intercom, full duplex audio intercom, 2 way radio, group walkie talkie, and so on. With 11 years experience on wireless digital technology products, we are very rich in natural resources, not only have a professional team with full energy, but also have a very professional quality control system. And company has international advanced production equipment, leading development laboratory in the world, and more then 40 development engineers, committed to provide high quality service and high quality products to customer all over the world. We also provide ODM services to companies all over the world, customers just provide us idea based on wireless technology, we can make these good ideas to be real product.
Our company spirit is “TA security, Quality Pilotage”. We believe that quality service and good quality control is the basis for the development of long-term. Your satisfaction is our best reward, If you have any needs, please feel free to contact us anytime, we will give you the perfect answer.
Our company spirit is “TA security, Quality Pilotage”. We believe that quality service and good quality control is the basis for the development of long-term. Your satisfaction is our best reward, If you have any needs, please feel free to contact us anytime, we will give you the perfect answer.
2 Way Radio – Xiamen Yaoyi Trade Co., Ltd.
Xiamen Yaoyi Trade Co., Ltd. is the subsidiary company of Yifan Industry Co., Ltd., focusing on the sale of Yifan wireless data terminals.
Yifan is engaged in the production and sale of communication terminal products. We offer industrial Modems, 2 way radio ,Cellular IP modems, Cellular Industrial Routers, Commercial WIFI Routers, 3G SOHO Routers, 3G USB modems and 3G GPS terminals, covering GSM, GPRS, CDMA, EDGE, 3G WCDMA/HSDPA/HSUPA, 3G CDMA2000 1X EVDO and 3G TD-SCDMA networks.
Yifan data terminals are widely used in M2M fields, such as financial industry, power systems, water monitoring, environmental protection, oil fields, weather forecast, environmental protection, street lamp control, post, Video Monitoring, security surveillance, etc. Our products are exported to more than 60 countries and regions. Our clients include some of the major global distributors and importers throughout Asia, Europe, Africa, the Middle East, South America and North America.
We have strong research and development teams. 80% engineers in our R&D department have the graduate degree. They all have many years of rich experience and industry background. Meanwhile, the proportion of undergraduate students is up to 90% in other teams. There are not only senior staff members with professional experience, but also newcomers who are good at innovation and full of vitality in our company.
We are making great efforts to meet the growing requirement of customers all over the world.
Satisfaction is our promise to clients. If you are interested in any of our products, or are searching for a supplier providing OEM service, please do not hesitate to contact us.
Yifan is engaged in the production and sale of communication terminal products. We offer industrial Modems, 2 way radio ,Cellular IP modems, Cellular Industrial Routers, Commercial WIFI Routers, 3G SOHO Routers, 3G USB modems and 3G GPS terminals, covering GSM, GPRS, CDMA, EDGE, 3G WCDMA/HSDPA/HSUPA, 3G CDMA2000 1X EVDO and 3G TD-SCDMA networks.
Yifan data terminals are widely used in M2M fields, such as financial industry, power systems, water monitoring, environmental protection, oil fields, weather forecast, environmental protection, street lamp control, post, Video Monitoring, security surveillance, etc. Our products are exported to more than 60 countries and regions. Our clients include some of the major global distributors and importers throughout Asia, Europe, Africa, the Middle East, South America and North America.
We have strong research and development teams. 80% engineers in our R&D department have the graduate degree. They all have many years of rich experience and industry background. Meanwhile, the proportion of undergraduate students is up to 90% in other teams. There are not only senior staff members with professional experience, but also newcomers who are good at innovation and full of vitality in our company.
We are making great efforts to meet the growing requirement of customers all over the world.
Satisfaction is our promise to clients. If you are interested in any of our products, or are searching for a supplier providing OEM service, please do not hesitate to contact us.
2 Way Radio – Fujian Nan’an Baofeng Electronics Co., Ltd.
Fujian Nan’an Baofeng Electronics Co., Ltd. specializes in the research, manufacture and sale of communication products. Founded in 1993, we now have over 300 employees and operate two manufacturing plants and 2 way radio.
Baofeng is committed to offering efficient service and products of reliable quality and reliable performance. Having been one of the leading wireless solution providers, we offer long-range cordless phones and transceivers.
We insist on the tenet of “developing our company by advanced technologies”. Our R&D team has greatly contributed to the success of our company. Under efficient management and strict quality control, we regularly introduce new items to meet the demands of rapidly changing market.
We always keep our promise of offering customers the first-class products and the most competitive prices. If you are interested in any of our products, please contact us right now for details!
Baofeng is committed to offering efficient service and products of reliable quality and reliable performance. Having been one of the leading wireless solution providers, we offer long-range cordless phones and transceivers.
We insist on the tenet of “developing our company by advanced technologies”. Our R&D team has greatly contributed to the success of our company. Under efficient management and strict quality control, we regularly introduce new items to meet the demands of rapidly changing market.
We always keep our promise of offering customers the first-class products and the most competitive prices. If you are interested in any of our products, please contact us right now for details!
2 Way Radio – Guangzhou Tiger Electron Science & Technology Co., Ltd.
Guangzhou Tiger Electron Science & Technology Co., Ltd. is a subsidiary company of Tiger International Development Co., Ltd. Our group was established in 2000 in Dubai, and started our business as a trading company. After several years’ accumulation, we have had a big group of good manufacturers and supporters. We are concerned with the design, development and production of telecommunication equipment. We have branches in Fujian, Guangzhou and Dubai, with convenient transportation access. All of our products 2 way radios comply with international quality standards and are greatly appreciated in a variety of different markets throughout the world.
With more than ten years’ experience in telecommunication product trading, we sell our products to the Middle East, Africa, the USA, Canada, etc.
If you are interested in any of our products or would like to discuss a customized order, please feel free to contact us. We are looking forward to forming successful business relationships with new clients around the world in the near future.
With more than ten years’ experience in telecommunication product trading, we sell our products to the Middle East, Africa, the USA, Canada, etc.
If you are interested in any of our products or would like to discuss a customized order, please feel free to contact us. We are looking forward to forming successful business relationships with new clients around the world in the near future.
2 Way Radio – Quanzhou Xintai Communication Equipment Co., Ltd.
Quanzhou Xintai Communication Equipment Co., Ltd. was founded in 1991. Our company has owned our factory since 2003, and the factory is Quanzhou YANTON Electronices Co.,Ltd .Our company is located in the electronic market of Quanzhou, China. Our company was only a trade company in 1991. With business development, our company started to produce and create the brand of Yanton in 2003.Now we are a professional manufacturer that specializes in portable transceivers and related accessories, such as 2 way radio batteries, chargers, antennas and earphones.
So far, we have had more than 100 well-trained employees. Under the condition of continual employment, well-trained professional technicians and advanced equipment, we can provide high quality and efficient products. Also we own highly efficient production management and strict management of human resources. We have advantages in service and price.
Due to competitive prices and satisfactory services, our products have gained a very good reputation among customers from at home and abroad. Now we would like to expand our business and develop more worldwide business relationships. We will make every effort to supply the best quality and service if we have the opportunity to work for you. We hope to establish long-term and good cooperative relationships and develop together with you.
So far, we have had more than 100 well-trained employees. Under the condition of continual employment, well-trained professional technicians and advanced equipment, we can provide high quality and efficient products. Also we own highly efficient production management and strict management of human resources. We have advantages in service and price.
Due to competitive prices and satisfactory services, our products have gained a very good reputation among customers from at home and abroad. Now we would like to expand our business and develop more worldwide business relationships. We will make every effort to supply the best quality and service if we have the opportunity to work for you. We hope to establish long-term and good cooperative relationships and develop together with you.
2 Way Radio – Quanzhou HLT Electronic Technology Co., Ltd.
Quanzhou HLT Electronic Science Technologies Co., Ltd. lies in Houmao Industrial Area, Quanzhou of Fujian Province, the beautiful historical cultural city. We are an enterprise which is engaged in the communication trade. Our main products are handheld 2 way radios.
HLT pays attention to the cultivation of talents and the renewal of technology. We have got the development at a full speed through a few years’ opening-up and innovation. Since the establishment, we have been adhering to the business principle of “sincerity, with reliable product quality all the time”. Our perfect service has gained us favorable comments of numerous users, and we have established long-term cooperation with a lot of users, as well as a lot of domestic and international famous enterprises. We have expanded the production scale, strengthened the competitiveness of the products, and occupied the position so that we can’t be ignored in the product market during the domestic communication. We regard science and technology as the guide, take quality as the thread, rely on rich technical force, abundant capital source, high-quality production, and team of engineering, and use the latest scientific and technological information, rigorous management system and advanced checkout equipment
The commitment of heavy prestige is our pursuit. Our company always follows this aim during production. Our company will continue with good enterprise prestige, perfect management and administration, and perfect excellent service standard. We will try our best to wholeheartedly serve you, and make every effort to achieve the most powerful communication of the whole country.
We regard the most extensive and the highest quality as the goal, create the leading position around the world, promote and improve the domestic communication and electronic engineering level, and make great efforts to realize the convenient communication in the society, as well as benefit the end-users.
HLT pays attention to the cultivation of talents and the renewal of technology. We have got the development at a full speed through a few years’ opening-up and innovation. Since the establishment, we have been adhering to the business principle of “sincerity, with reliable product quality all the time”. Our perfect service has gained us favorable comments of numerous users, and we have established long-term cooperation with a lot of users, as well as a lot of domestic and international famous enterprises. We have expanded the production scale, strengthened the competitiveness of the products, and occupied the position so that we can’t be ignored in the product market during the domestic communication. We regard science and technology as the guide, take quality as the thread, rely on rich technical force, abundant capital source, high-quality production, and team of engineering, and use the latest scientific and technological information, rigorous management system and advanced checkout equipment
The commitment of heavy prestige is our pursuit. Our company always follows this aim during production. Our company will continue with good enterprise prestige, perfect management and administration, and perfect excellent service standard. We will try our best to wholeheartedly serve you, and make every effort to achieve the most powerful communication of the whole country.
We regard the most extensive and the highest quality as the goal, create the leading position around the world, promote and improve the domestic communication and electronic engineering level, and make great efforts to realize the convenient communication in the society, as well as benefit the end-users.
2 Way Radio – Quanzhou Henghui Plastic Electron Industry Co., Ltd.
QUANZHOU HENGHUI Plastic Electron CO., LTD. located in the famous culture city “International Garden City” — “QUANZHOU” Where is near mountain and sea, close to train station and airport: 30 minutes to JINJIANG Airport and 1 hour to Xiamen International Airport and 10 minutes to QUANZHOU train station. It has advantage environment and traffic.
Our company established in 2003, capital of 3 million, since its foundation, our Company never stop its hard working on the development of unlimited terminal to customer’s requirement.
We are the ideal supplier for your telecom product needs, we offer you series of “SHOUAO” brand cordless 2 way radio, walkie-talkie, in-vehicle radio. Customization services are also available on request.
Our company has modern standard plant, advanced product line and modern equipment including Automatic Painting Machine, SMT line, Spectrum Analyzer and Radio Communication Test Set.
With a staff of nearly 100 and about 3000 square meter of floor space (1500 square meters for office and producing, 1500 square meter for lodging house),over 10 talented engineers release more than 10 new products annually, we are able to supply million mobile radio and two way radio annually.
As a leading high technology enterprise with innovative technology, all of our products are exported to Middle East, Brazil, Mexico, Singapore, Philippines, Indonesia, India, Malaysia, Pakistan and Russia
Modern management idea, advanced technical skill, perfect QC management and after sales service have established stable ground work which will guarantee our long term development.
Our company established in 2003, capital of 3 million, since its foundation, our Company never stop its hard working on the development of unlimited terminal to customer’s requirement.
We are the ideal supplier for your telecom product needs, we offer you series of “SHOUAO” brand cordless 2 way radio, walkie-talkie, in-vehicle radio. Customization services are also available on request.
Our company has modern standard plant, advanced product line and modern equipment including Automatic Painting Machine, SMT line, Spectrum Analyzer and Radio Communication Test Set.
With a staff of nearly 100 and about 3000 square meter of floor space (1500 square meters for office and producing, 1500 square meter for lodging house),over 10 talented engineers release more than 10 new products annually, we are able to supply million mobile radio and two way radio annually.
As a leading high technology enterprise with innovative technology, all of our products are exported to Middle East, Brazil, Mexico, Singapore, Philippines, Indonesia, India, Malaysia, Pakistan and Russia
Modern management idea, advanced technical skill, perfect QC management and after sales service have established stable ground work which will guarantee our long term development.
2 Way Radio – Quanzhou Truest Communication Co., Ltd.
Our company specializes in developing and manufacturing professional two-way radios and two way radio accessories, such as two way radio earphones, microphones, headsets, rubber and metal telescopes, 2 way radio antennas, two way radio battery packs, battery cases, chargers, programming cables, housings, belt clips, all kinds of communication antennas (vehicle antennas, car whip antennas, CB antennas, Omni directional fiber glass antennas, directional Yagi antennas, wireless public phone antennas, WLAN antennas, DVB-T antennas, broadband Omni antennas, sector Panel antennas, car whip antenna Mounting Brackets, GSM&CDMA antennas and other communication device antennas), signal Boosters, Amplifiers and Repeaters.
Our company is located in famous Quanzhou City, China. We have 20 communication experts and 350 staff members. We have ISO9001:2000 certified quality management systems. Our products are sold to America, Europe, Southeast Asia, Africa and other countries and regions. Our products are very popular in domestic market based on hi-end technology, perfect management and excellent service.
Our aim: “Good Management, offering the superior quality products and the best service to satisfy customers’ needs”.
Our service spirit: “the clients are our life, client’s business is our business, and we are on the same boat”.
Our general manager and whole staff members hope to cooperate with customers in various countries and regions. We welcome your enquiries. Thank you.
Our company is located in famous Quanzhou City, China. We have 20 communication experts and 350 staff members. We have ISO9001:2000 certified quality management systems. Our products are sold to America, Europe, Southeast Asia, Africa and other countries and regions. Our products are very popular in domestic market based on hi-end technology, perfect management and excellent service.
Our aim: “Good Management, offering the superior quality products and the best service to satisfy customers’ needs”.
Our service spirit: “the clients are our life, client’s business is our business, and we are on the same boat”.
Our general manager and whole staff members hope to cooperate with customers in various countries and regions. We welcome your enquiries. Thank you.
2 Way Radio – Quanzhou Kingpo Electronic Co., Ltd.
Quanzhou Kingpo Electronic Co.,Ltd is a professional 2 way radio manufacturer located in the beautiful historical and cultural city – Quanzhou, Fujian Province of China. We specialize developing, producing and marketing the two-way radio.
KINGPO, the main force of the professional wireless communications field in china, We are committed to providing our customers with high quality products with the reasonable price and aim to offer the best service to satisfy our customers with professional knowledge.
With several years’ experience in this field, we posse our own management theory, professional technology and a strong team of professionals.
At present, we sell two-way radio at home and abroad. Our products are popular with the customers.We have ever exported to all over the world, such as Russia, South Africa, South America, South East Asia and the Middle East Region.
We will insist on the enterprise aim of “your satisfaction, our eternal commitment and pursuing “. We will try our best to offer the first-class products, and cast the open ,wide and brilliant career for tomorrow together. Your satisfaction will always be our commitment and pursuit.Sincerely hope we can enter into business relationship. If you are interested in any of our products, please feel free to contact us for more information.
KINGPO, the main force of the professional wireless communications field in china, We are committed to providing our customers with high quality products with the reasonable price and aim to offer the best service to satisfy our customers with professional knowledge.
With several years’ experience in this field, we posse our own management theory, professional technology and a strong team of professionals.
At present, we sell two-way radio at home and abroad. Our products are popular with the customers.We have ever exported to all over the world, such as Russia, South Africa, South America, South East Asia and the Middle East Region.
We will insist on the enterprise aim of “your satisfaction, our eternal commitment and pursuing “. We will try our best to offer the first-class products, and cast the open ,wide and brilliant career for tomorrow together. Your satisfaction will always be our commitment and pursuit.Sincerely hope we can enter into business relationship. If you are interested in any of our products, please feel free to contact us for more information.
2 Way Radio – Quanzhou New-Telt Electronic Technology Co., Ltd.
Established in 2005, and get the export license in 2009, Quanzhou New-Telt Electronic Technology Co., Ltd. is a manufacturer and exporter who specialized in the research, development and production of high-tech wireless communication equipment,such as two way radio,walkie talkie,and two way radio accessories.
All of our goods are produced in-house so that we can ensure quality.12 engineers,each with a decade of expertise.And with three production lines,we manufacture up to15 000 2 way radios monthly.At the same time,OEM service are welcome .
Our company advocates win-win business in the international trade.
All of our goods are produced in-house so that we can ensure quality.12 engineers,each with a decade of expertise.And with three production lines,we manufacture up to15 000 2 way radios monthly.At the same time,OEM service are welcome .
Our company advocates win-win business in the international trade.
2 Way Radio – Fujian Nanan Quansheng Electronics Co., Ltd.
QS Electronics Co., Ltd. is established in 1996, which is one of the leading manufacturers of interphone in China. Our company specialized in developing and producing the wireless communication equipment and all kinds of accessories. Moreover, we have a highly trained R&D team, and dedicate to researching and developing products to meet the demands of the rapidly changing market.
QS has been professional in management and production, as well as aimed at “Quality best, Customer first”. It has guided the market direction and innovation,and has developed wide series of new&high technology products,such as TG-K4AT,TG-91A, TG-A380,TG-5A,TG-800,TG-K58,TG-UV,TG-350,etc. totally more than 30 models professional and amateur handheld 2 way radios, thereinto,TG-UV2 is the first dual band radio produced by our factory in china and dramatically meets the market demand
Our company integrating research, development, production and sale, makes us covering an area of more than 5000 square meters, and has a staff of more than 200 persons. We have built up a strong OEM capability, and have a monthly output exceeding 50000 products.
Our company imported advanced production lines, testing equipment and excellent management system, which has been certified by ISO9001:2000 certification and CE,FCC ,ROHS ceritification. And our products have been certified by Radio Transmission Equipment Type Approval certificate.
By the development of the technology and improved quality, QS Electronics Co., Ltd. meets the demands of the home market, simultaneously; tend towards to the international market such as the European , North American, Asia. Africa, and so on.
Moreover, we always keep our promise of offering customers high quality products with the most competitive price. If you are interested in any of the telecommunications products we manufacture, please feel free to contact us for further details, and your inquiries will always be welcomed. Your success is our achievement.
QS has been professional in management and production, as well as aimed at “Quality best, Customer first”. It has guided the market direction and innovation,and has developed wide series of new&high technology products,such as TG-K4AT,TG-91A, TG-A380,TG-5A,TG-800,TG-K58,TG-UV,TG-350,etc. totally more than 30 models professional and amateur handheld 2 way radios, thereinto,TG-UV2 is the first dual band radio produced by our factory in china and dramatically meets the market demand
Our company integrating research, development, production and sale, makes us covering an area of more than 5000 square meters, and has a staff of more than 200 persons. We have built up a strong OEM capability, and have a monthly output exceeding 50000 products.
Our company imported advanced production lines, testing equipment and excellent management system, which has been certified by ISO9001:2000 certification and CE,FCC ,ROHS ceritification. And our products have been certified by Radio Transmission Equipment Type Approval certificate.
By the development of the technology and improved quality, QS Electronics Co., Ltd. meets the demands of the home market, simultaneously; tend towards to the international market such as the European , North American, Asia. Africa, and so on.
Moreover, we always keep our promise of offering customers high quality products with the most competitive price. If you are interested in any of the telecommunications products we manufacture, please feel free to contact us for further details, and your inquiries will always be welcomed. Your success is our achievement.
2012年12月25日星期二
Explosion-proof two-way radio
Explosion-proof 2 way radio is one that can work in explosive gases of radio. And different civil interphone, explosion-proof interphone are not refers to the explosion radio that can resist itself, but that can be in explosive gases worked under this radio. We know, radio signal transmitted by the electromagnetic wave to, and the transmission of electromagnetic wave depends on the electric and magnetic fields continuously convert, in this kind of conversion process is easy to produce the spark. And because the lines on the explosion protection through special processing, conversion might occur during the process of all the places are shielded sparks.
Explosion-proof interphone are coated with FM/ATEX the authentication tags to show that the product has been the association of authentication, can be used for specific dangerous gases. At the same time, the label will clearly marked danger level/branches/group and must use the battery’s accessories number.
Because on radio disassembling of electric spark generated when the contact will explode or fire, therefore, users in the explosion proof type use process, not in danger in the environment to change batteries and other accessories. Even after explosion-proof authentication products detection institutions, the atmosphere in dangerous when using, and not to be accessories connector exposure to the outside. If users don’t need to use accessories connectors, should be closely covered with dust mask.
Explosion-proof interphone are coated with FM/ATEX the authentication tags to show that the product has been the association of authentication, can be used for specific dangerous gases. At the same time, the label will clearly marked danger level/branches/group and must use the battery’s accessories number.
Because on radio disassembling of electric spark generated when the contact will explode or fire, therefore, users in the explosion proof type use process, not in danger in the environment to change batteries and other accessories. Even after explosion-proof authentication products detection institutions, the atmosphere in dangerous when using, and not to be accessories connector exposure to the outside. If users don’t need to use accessories connectors, should be closely covered with dust mask.
2 Way Radio – Quanzhou Joytone Trading Co., Ltd.
Quanzhou Joytone Trading Company is located in Quanzhou City. With an experienced and professional team, we have exported our products to many countries and regions all over the world, especially North America, South America, Europe, the Middle East and Africa. We enjoy a good reputation among our customers.
Quanzhou Joytone Trading Company is a manufacturer of 2 way radios, with well-equipped testing equipment and strong technical force. With a wide range, good quality, reasonable prices and stylish designs, our products are welcomed by clients.
Quanzhou Joytone Trading Company is a manufacturer of 2 way radios, with well-equipped testing equipment and strong technical force. With a wide range, good quality, reasonable prices and stylish designs, our products are welcomed by clients.
2 Way Radio – Fujian Quanzhou MYT Electronics Co., Ltd.
Our company is a high-tech enterprise, founded in 1994, and specializes in developing, manufacturing and marketing 2 way radios and related accessories. Equipped with a group of professional engineers and advanced facilities, we nowadays are able to accept substantial OEM and ODM production orders.
In the past dozens of years, we have put plenty of funds for new product design to make development of the self-owner brand. By now, we have got a good reputation of MYT series of two ways radios.
Our company always attaches great importance to establishing long-term and friendly business relationships with customers both at home and abroad. By now, our products have been sold to North America, Europe, Southeast Asia, South Africa and so on.
Our company persists in winning consumer recognition by good quality guarantee and excellent services. All our radios comply with FCC, CE and RoHS requirements.
Make your today better, and we will always be in your side. Pick up your phone and contact us today!
In the past dozens of years, we have put plenty of funds for new product design to make development of the self-owner brand. By now, we have got a good reputation of MYT series of two ways radios.
Our company always attaches great importance to establishing long-term and friendly business relationships with customers both at home and abroad. By now, our products have been sold to North America, Europe, Southeast Asia, South Africa and so on.
Our company persists in winning consumer recognition by good quality guarantee and excellent services. All our radios comply with FCC, CE and RoHS requirements.
Make your today better, and we will always be in your side. Pick up your phone and contact us today!
2 Way Radio – Quanzhou Keci Exactitude Electronic Co., Ltd.
Quanzhou Keci Exactitude Electronic Co., Ltd. was established in 2000, located in Qingmeng Development Area of Quanzhou, China. We are approved by Quanzhou government.
We are a professional manufacturer that specializes in 2 way radios,such as ham radios(HT radios), business radios, Vehicle-mounted radios(mobile radios), CB radios and related accessories including walkie talkie battery, antenna and microphone for handhedl radios and mobile radios.
Our brand name is Kecitong and ViTai. Since foundation, our company has never stopped hard working on development of unlimited terminal to satisfy customers’ requirements. With several years’ accumulation of technique and experience, our company has become a top enterprise equipped with the latest technology, high class devices, perfect management, good quality products and circumspect service.
As a leading hi-tech enterprise with innovative technology, we mainly produce high-quality two way radios, including accessories. Various accessories can be applied to many kinds of walkie-talkies and digital cluster machines. All of our products are exported to more than 50 foreign countries and areas, such as Europe, Southeast Asia, North America, Latin America and the Middle East.
Modern management idea, advanced technical skill, perfect QC management and good after-sales service have established stable groundwork which will guarantee our long term development.
We are a professional manufacturer that specializes in 2 way radios,such as ham radios(HT radios), business radios, Vehicle-mounted radios(mobile radios), CB radios and related accessories including walkie talkie battery, antenna and microphone for handhedl radios and mobile radios.
Our brand name is Kecitong and ViTai. Since foundation, our company has never stopped hard working on development of unlimited terminal to satisfy customers’ requirements. With several years’ accumulation of technique and experience, our company has become a top enterprise equipped with the latest technology, high class devices, perfect management, good quality products and circumspect service.
As a leading hi-tech enterprise with innovative technology, we mainly produce high-quality two way radios, including accessories. Various accessories can be applied to many kinds of walkie-talkies and digital cluster machines. All of our products are exported to more than 50 foreign countries and areas, such as Europe, Southeast Asia, North America, Latin America and the Middle East.
Modern management idea, advanced technical skill, perfect QC management and good after-sales service have established stable groundwork which will guarantee our long term development.
2 Way Radio – Quanzhou Keci Exactitude Electronic Co., Ltd.
Quanzhou Keci Exactitude Electronic Co., Ltd. is a professional & hi-tech enterprise which is engaged in the research and manufacture of wireless telecommunication series of products. Since our foundation, our company never stops its hard working on the development of unlimited terminals to satisfy the customer’s requirement. With several years’ techniques and experience accumulation, our company has become a top ranking enterprise equipped with the latest technology, high class devices, perfect management, good quality products and circumspect service.
As a leading hi-tech enterprise with innovative technology, our company mainly produces high-quality 2 way radios, including accessories. Our products can be applied to many kinds of walkie-talkies and digital cluster machines. All of our products are exported to more than 50 foreign countries and areas covering Europe, Southeast Asia and the Middle East.
With modern management ideas, advanced technical skills, perfect QC management and after-sales service, our company has established a stable groundwork which will guarantee our long term development.
As a leading hi-tech enterprise with innovative technology, our company mainly produces high-quality 2 way radios, including accessories. Our products can be applied to many kinds of walkie-talkies and digital cluster machines. All of our products are exported to more than 50 foreign countries and areas covering Europe, Southeast Asia and the Middle East.
With modern management ideas, advanced technical skills, perfect QC management and after-sales service, our company has established a stable groundwork which will guarantee our long term development.
2 Way Radio – Fujian Nan’an Baofeng Electronics Co., Ltd.
Fujian Nan’an Baofeng Electronics Co., Ltd. specializes in the research, manufacture and sale of communication 2 way radio products. Founded in 1993, we now have over 300 employees and operate two manufacturing plants.
Baofeng is committed to offering efficient service and products of reliable quality and reliable performance. Having been one of the leading wireless solution providers, we offer long-range cordless phones and transceivers.
We insist on the tenet of “developing our company by advanced technologies”. Our R&D team has greatly contributed to the success of our company. Under efficient management and strict quality control, we regularly introduce new items to meet the demands of rapidly changing market.
We always keep our promise of offering customers the first-class products and the most competitive prices. If you are interested in any of our products, please contact us right now for details!
Baofeng is committed to offering efficient service and products of reliable quality and reliable performance. Having been one of the leading wireless solution providers, we offer long-range cordless phones and transceivers.
We insist on the tenet of “developing our company by advanced technologies”. Our R&D team has greatly contributed to the success of our company. Under efficient management and strict quality control, we regularly introduce new items to meet the demands of rapidly changing market.
We always keep our promise of offering customers the first-class products and the most competitive prices. If you are interested in any of our products, please contact us right now for details!
Marine two-way radio
Marine 2 way radio is particularly strong professional the intercom, its using environment is bad, and a wide range of ship activities, sea temperature have a big changes , to adapt to the needs of the global maritime security voyage, the product design is very professional, working frequency is unified, according to international maritime communications uniform provisions of the sea on the Marine pretty frequency , range from TX 156.025 MHz-157.425 MHz, RX from 156.050 MHz-163.275 MHz.
Work channel divided into international channel, and channel the channel and Canada channel, and 10 weather channel (8 of them is the weather channel, 2 is Canada weather channel). Three kinds of work is three channel , is channel standard version, all sorts of Marine intercom has three standard version. User use requirements, in the choose and buy of Marine interphone also choose different versions of the frequency. The frequency standards version of the country the United States more, our country is used mostly the United States Marine radio version, it is said that could be the frequency version of the same frequency point more, different frequency is less.
Function introduction:
1, solid structure, excellent waterproof function, accord with JIS waterproof level 7 waterproof standard.
2, the operation is simple, the big key design, make with gloves can also simple and easy operation. With another key lock function. And for each key set up different keys sounds.
3, high capacity of lithium battery (7.4 V 1700 mAh), another optional AA alkaline battery box of BP226, facilitate in an emergency situation. Set aside.
4, the larger the LCD monitor to display more clearly.
5, a self-check function.
Work channel divided into international channel, and channel the channel and Canada channel, and 10 weather channel (8 of them is the weather channel, 2 is Canada weather channel). Three kinds of work is three channel , is channel standard version, all sorts of Marine intercom has three standard version. User use requirements, in the choose and buy of Marine interphone also choose different versions of the frequency. The frequency standards version of the country the United States more, our country is used mostly the United States Marine radio version, it is said that could be the frequency version of the same frequency point more, different frequency is less.
Function introduction:
1, solid structure, excellent waterproof function, accord with JIS waterproof level 7 waterproof standard.
2, the operation is simple, the big key design, make with gloves can also simple and easy operation. With another key lock function. And for each key set up different keys sounds.
3, high capacity of lithium battery (7.4 V 1700 mAh), another optional AA alkaline battery box of BP226, facilitate in an emergency situation. Set aside.
4, the larger the LCD monitor to display more clearly.
5, a self-check function.
Window two-way radios
6000A high fidelity, pure metal window 2 way radio high power is applicable to any window difficult to talk of place, for voice communication electronic talkback system, it adopts the most advanced speech processing chip and unique design and strict quality management, can in sound quality, volume, anti-jamming, the screaming and all kinds of performance to the highest standards, products widely used in Banks, hospitals, station, securities, and other window.
Product features:
1, linear flow external extension, circular design, small size, more beautiful, and the installation is more reasonable.
2, pure metal host using high quality speaker, bring their own long (50 cm) metal hose microphone, more convenient and extension freedom’s two-way the intercom.
3, inside and outside the volume can adjust alone, unique dynamic track work indicator.
4, microcomputer processing circuit, static noise function, and thoroughly solved echo, screaming problem.
5, have recording jack, can output the double way inside and outside voice signal (with the bank teller recording).
Installation instructions:
1, will host installed in workshop inside, extension installed in the workshop, the connection to the extension will head into a connection with the extension jack.
2, will insert the 220 V power transformer utility, DC12V power of the host insert the plug into the socket.
3, open the host the power switch, the power instructions the red light. Said power working normally.
4, inside volume knob and the volume knob, which can adjust the volume inside and outside, when the intercom above two lights regulator with inside and outside the intercom will rotate hint, work in the personnel from the outside of the voice of the extension expansion; Outside the voice of the customer from inside the host the expansion. Intercom said two-way work normally.
Product features:
1, linear flow external extension, circular design, small size, more beautiful, and the installation is more reasonable.
2, pure metal host using high quality speaker, bring their own long (50 cm) metal hose microphone, more convenient and extension freedom’s two-way the intercom.
3, inside and outside the volume can adjust alone, unique dynamic track work indicator.
4, microcomputer processing circuit, static noise function, and thoroughly solved echo, screaming problem.
5, have recording jack, can output the double way inside and outside voice signal (with the bank teller recording).
Installation instructions:
1, will host installed in workshop inside, extension installed in the workshop, the connection to the extension will head into a connection with the extension jack.
2, will insert the 220 V power transformer utility, DC12V power of the host insert the plug into the socket.
3, open the host the power switch, the power instructions the red light. Said power working normally.
4, inside volume knob and the volume knob, which can adjust the volume inside and outside, when the intercom above two lights regulator with inside and outside the intercom will rotate hint, work in the personnel from the outside of the voice of the extension expansion; Outside the voice of the customer from inside the host the expansion. Intercom said two-way work normally.
Shortwave two-way radio
Short wave 2 way radio is a kind of radio, use frequency is short wave. Short wave of basic transmission way has two: one is the ground wave, one is heaven wave. As stated above, the surface of the earth spread along the ground, the transmission distance depends on the surface medium characteristics. The sea of medium for radio waves propagation characteristics to conductivity most favorable, short wave signal can be ground coastal face spread about 1000 kilometers; The land surface medium poor conductance characteristics, the waves attenuation, and different land surface media on the waves of the attenuation rate is not (the moist soil ground attenuation small, dry sand ground attenuation big). Short wave signal propagation along the ground can be at most a few tens of kilometers. Ground spread don’t need to change often work frequency, but want to consider the obstacles blocking, this heaven wave spread is different. The main transmission way shortwave is heaven wave . Short wave signal the antenna is issued, the ionosphere reflected back to the surface, and the ground reflected back to the ionosphere, can reflect many times, and spread far distance.
Two-way radio battery
The 2 way radio battery can be divided into nickel cadmium battery (Ni-Cd), the nimh batteries and lithium battery (Li-ion), has a capacity 600 mAh, 800 mAh, 1100 mAh, 1500 mAh range. Lithium battery cost is expensive, still in the development stage. Ni-Cd and Ni-MH battery is used more generally, generally the large capacity battery recommend Ni-MH battery.
Usually the battery charging on the 300 ~ 500 times, and battery life in their own aging general 12 to 20 months or so. Lithium battery as long as but charge to put, or short circuit can prolong service life.
Long-term storage battery, charged save more ideal. On the general asks its lithium battery power control of 40% or more, save the optimum condition of the nimh batteries is charged 80% save, conditional stored in 15 ℃ or even lower temperatures even better. Different temperature and saturated degree of the aging under different range.
The first time use test:
1, to ensure that the battery transportation safety, the battery is out in only some of the power. In transit to ensure safety, not all full of electricity, so the user (including a distributor) in buying interphone, should first 3 times the filling the, in order to maximize activate battery capacity.
2, use to charge the battery row filling, configuration of the battery troubleshooting, please a test a battery and a battery tank. Defects battery may let another not normal charging the battery in the slot, killing several batteries have failed to charge.
Usually the battery charging on the 300 ~ 500 times, and battery life in their own aging general 12 to 20 months or so. Lithium battery as long as but charge to put, or short circuit can prolong service life.
Long-term storage battery, charged save more ideal. On the general asks its lithium battery power control of 40% or more, save the optimum condition of the nimh batteries is charged 80% save, conditional stored in 15 ℃ or even lower temperatures even better. Different temperature and saturated degree of the aging under different range.
The first time use test:
1, to ensure that the battery transportation safety, the battery is out in only some of the power. In transit to ensure safety, not all full of electricity, so the user (including a distributor) in buying interphone, should first 3 times the filling the, in order to maximize activate battery capacity.
2, use to charge the battery row filling, configuration of the battery troubleshooting, please a test a battery and a battery tank. Defects battery may let another not normal charging the battery in the slot, killing several batteries have failed to charge.
Two-way radio battery
The 2 way radio cautions:
1)Before charging the temperature of the battery please keep in 20 ℃ or so, at the same time in charge at room temperature, in 4 ℃ below or 40 ℃ above ambient temperature charging can affect the life of the battery and charging efficiency.
2)The battery in the low power please call the police to replace the battery and the battery charge, avoid excessive discharge battery.
3)Please be sure to use the radio with standard battery seat charger or platoon to corresponding to charge the battery charge.
4)In normal battery charging completes please take out the battery in time, avoid the battery overcharge and affect battery life.
5)Please separate charge for recharging the battery, on radio charge must close on the power source;
6)The battery charging before the finish please don’t take it out at will, lest affect battery charging efficiency and life.
7)do not continue to already full of electric battery charging, lest the battery overcharge and damage the battery life.
8)Ban on the use of fine wire metal objects such as direct contact with the battery side or the discharge of a battery, prevent battery short-circuit.
9) battery should be gentle with, and take good care of use, avoid the circumstance such as the rain fall or damage to the battery.
10) battery is flammable and explosive substances, please do not be put into the fire or in battery service stations use dangerous area.
11) battery is not a maintenance product, occurrence breakdown please contact interphone battery authorized dealers, pit or directly dial service hotlink, please do not disassemble the battery, prevent battery short-circuit.
1)Before charging the temperature of the battery please keep in 20 ℃ or so, at the same time in charge at room temperature, in 4 ℃ below or 40 ℃ above ambient temperature charging can affect the life of the battery and charging efficiency.
2)The battery in the low power please call the police to replace the battery and the battery charge, avoid excessive discharge battery.
3)Please be sure to use the radio with standard battery seat charger or platoon to corresponding to charge the battery charge.
4)In normal battery charging completes please take out the battery in time, avoid the battery overcharge and affect battery life.
5)Please separate charge for recharging the battery, on radio charge must close on the power source;
6)The battery charging before the finish please don’t take it out at will, lest affect battery charging efficiency and life.
7)do not continue to already full of electric battery charging, lest the battery overcharge and damage the battery life.
8)Ban on the use of fine wire metal objects such as direct contact with the battery side or the discharge of a battery, prevent battery short-circuit.
9) battery should be gentle with, and take good care of use, avoid the circumstance such as the rain fall or damage to the battery.
10) battery is flammable and explosive substances, please do not be put into the fire or in battery service stations use dangerous area.
11) battery is not a maintenance product, occurrence breakdown please contact interphone battery authorized dealers, pit or directly dial service hotlink, please do not disassemble the battery, prevent battery short-circuit.
Two-way radio headset
Headset microphone headset and the combination of that more for voice chat and video conference and so on, that is to say, both on the microphone headset and the function. 2 way radio headset is mainly used in radio communication equipment such as a radio audio input/output, according to different environment and use corresponding assembly different headset.
Radio headset main types:
Wireless headset: strong concealment, applicable to the important security, surveillance and need to completely hidden under the environment.
Receive only headset: shoulder microphones special receive only earplugs type.
Ear bone in-ear headphones: vibration type MIC telephone transmitter, transmitter and receiver telephone transmitter becoming one. Applicable to public safety, special forces and all kinds of noisy environment.
Throat vibration in-ear headphones: choose vibration type MIC telephone transmitter, telephone transmitter of noise function. Apply to all kinds of noisy environment.
Light is wearing headphones: after hanging headphones, can wear helmet use. Apply to retail, entertainment, hotel, restaurant, community security, etc.
Monitoring headset (wired, two lines, three lines) : PTT, MIC and SPK three line, facilitate concealment. Apply public security, police, military and other special industry personnel.
The principle and the use of radio headset:
Radio headset is actually PTT (call button), MIC (MIC) and (SPK) headphones and integrated to extend and become, it makes use of the radio and more easy to use. Use, just putting headphone jacks plug into the earpiece remove plug, cable card fixed in the collar, headphones into the ears. The first time can use test, according to the call button on the headset to the microphone appeal, answer to each other that normal use of headset.
Radio headset main types:
Wireless headset: strong concealment, applicable to the important security, surveillance and need to completely hidden under the environment.
Receive only headset: shoulder microphones special receive only earplugs type.
Ear bone in-ear headphones: vibration type MIC telephone transmitter, transmitter and receiver telephone transmitter becoming one. Applicable to public safety, special forces and all kinds of noisy environment.
Throat vibration in-ear headphones: choose vibration type MIC telephone transmitter, telephone transmitter of noise function. Apply to all kinds of noisy environment.
Light is wearing headphones: after hanging headphones, can wear helmet use. Apply to retail, entertainment, hotel, restaurant, community security, etc.
Monitoring headset (wired, two lines, three lines) : PTT, MIC and SPK three line, facilitate concealment. Apply public security, police, military and other special industry personnel.
The principle and the use of radio headset:
Radio headset is actually PTT (call button), MIC (MIC) and (SPK) headphones and integrated to extend and become, it makes use of the radio and more easy to use. Use, just putting headphone jacks plug into the earpiece remove plug, cable card fixed in the collar, headphones into the ears. The first time can use test, according to the call button on the headset to the microphone appeal, answer to each other that normal use of headset.
Public two-way radio
Public 2 way radio is to point to: the transmit power is not more than 0.5 W, work in the designated frequency wireless radios.
A lot of friends have such a view that civil interphone market after let go, can need not apply for such interphone, do not need to pay cost, namely buy which……. In fact this view wrong. Because the government open is just the public market and not on the consumers understand the civil interphone market. These two seemingly the same, there’s a big difference.
Because the cause of understanding, and part of the media not exactly propaganda really caused some misunderstanding to consumers, the public radio simply understand is for civil radio. And in fact mentioned in the notice of the “public radio” must not be equal to “civil interphone”, the two have different concepts.
Public radio is relative to the intercom professional terms, and civil interphone is relative to the military for radio, public radio is just one of the civil interphone. Users or use the unit only in the purchase in accordance with the provisions of the public radio, they don’t need a license, pay the Internet use, this was not to show all civil his radio.
A lot of friends have such a view that civil interphone market after let go, can need not apply for such interphone, do not need to pay cost, namely buy which……. In fact this view wrong. Because the government open is just the public market and not on the consumers understand the civil interphone market. These two seemingly the same, there’s a big difference.
Because the cause of understanding, and part of the media not exactly propaganda really caused some misunderstanding to consumers, the public radio simply understand is for civil radio. And in fact mentioned in the notice of the “public radio” must not be equal to “civil interphone”, the two have different concepts.
Public radio is relative to the intercom professional terms, and civil interphone is relative to the military for radio, public radio is just one of the civil interphone. Users or use the unit only in the purchase in accordance with the provisions of the public radio, they don’t need a license, pay the Internet use, this was not to show all civil his radio.
Kenwood two-way radio
Kenwood 2 way radio:
Working frequency range: 136 ~ 150, 150 ~ 174/400 ~ 420, 450 ~ 470 MHz
128 a frequency synthesis half duplex channel
Rf output power: 5 W / 4 W, eight 13 segment display
Using Flash ROM memory, super memory capacity
20 needle development terminal socket, provide second development purposes
Compandor speech pressure expansion technology
The built-in CTCSS/DQT/DYTMF / 2 TONE codec
Obligate space installation SmarTrunk Omni clustered pieces
16 channel models to choose from
Size (wide x high x deep) : x 135 x 32 mm (use KNB-14 battery)
Weight: about 400 g (including KNB-14 battery)
Small/light weight small volume, light weight, easy to carry, performance is remarkable. 128 a channel, the frequency synthesis technology, can store 128 duplex channel.
Using Flash ROM special software use memory can be replaced communication software work, make customer development special software and software upgrades into the future may be.
Super memory capacity of the machine can be installed freely several group and channel, each channel can be independent set to send and receive frequency, audio signal, the power of parameters, let users can be flexible network.
Comoandor (voice pressure expansion) using language pressure expansion technology, improve the sound quality, clear voice the ear.
To define function keys all function keys are independent programming, the user can define function on its own.
Working frequency range: 136 ~ 150, 150 ~ 174/400 ~ 420, 450 ~ 470 MHz
128 a frequency synthesis half duplex channel
Rf output power: 5 W / 4 W, eight 13 segment display
Using Flash ROM memory, super memory capacity
20 needle development terminal socket, provide second development purposes
Compandor speech pressure expansion technology
The built-in CTCSS/DQT/DYTMF / 2 TONE codec
Obligate space installation SmarTrunk Omni clustered pieces
16 channel models to choose from
Size (wide x high x deep) : x 135 x 32 mm (use KNB-14 battery)
Weight: about 400 g (including KNB-14 battery)
Small/light weight small volume, light weight, easy to carry, performance is remarkable. 128 a channel, the frequency synthesis technology, can store 128 duplex channel.
Using Flash ROM special software use memory can be replaced communication software work, make customer development special software and software upgrades into the future may be.
Super memory capacity of the machine can be installed freely several group and channel, each channel can be independent set to send and receive frequency, audio signal, the power of parameters, let users can be flexible network.
Comoandor (voice pressure expansion) using language pressure expansion technology, improve the sound quality, clear voice the ear.
To define function keys all function keys are independent programming, the user can define function on its own.
Working frequency range: 136 ~ 150, 150 ~ 174/400 ~ 420, 450 ~ 470 MHz
128 a frequency synthesis half duplex channel
Rf output power: 5 W / 4 W, eight 13 segment display
Using Flash ROM memory, super memory capacity
20 needle development terminal socket, provide second development purposes
Compandor speech pressure expansion technology
The built-in CTCSS/DQT/DYTMF / 2 TONE codec
Obligate space installation SmarTrunk Omni clustered pieces
16 channel models to choose from
Size (wide x high x deep) : x 135 x 32 mm (use KNB-14 battery)
Weight: about 400 g (including KNB-14 battery)
Small/light weight small volume, light weight, easy to carry, performance is remarkable. 128 a channel, the frequency synthesis technology, can store 128 duplex channel.
Using Flash ROM special software use memory can be replaced communication software work, make customer development special software and software upgrades into the future may be.
Super memory capacity of the machine can be installed freely several group and channel, each channel can be independent set to send and receive frequency, audio signal, the power of parameters, let users can be flexible network.
Comoandor (voice pressure expansion) using language pressure expansion technology, improve the sound quality, clear voice the ear.
To define function keys all function keys are independent programming, the user can define function on its own.
Working frequency range: 136 ~ 150, 150 ~ 174/400 ~ 420, 450 ~ 470 MHz
128 a frequency synthesis half duplex channel
Rf output power: 5 W / 4 W, eight 13 segment display
Using Flash ROM memory, super memory capacity
20 needle development terminal socket, provide second development purposes
Compandor speech pressure expansion technology
The built-in CTCSS/DQT/DYTMF / 2 TONE codec
Obligate space installation SmarTrunk Omni clustered pieces
16 channel models to choose from
Size (wide x high x deep) : x 135 x 32 mm (use KNB-14 battery)
Weight: about 400 g (including KNB-14 battery)
Small/light weight small volume, light weight, easy to carry, performance is remarkable. 128 a channel, the frequency synthesis technology, can store 128 duplex channel.
Using Flash ROM special software use memory can be replaced communication software work, make customer development special software and software upgrades into the future may be.
Super memory capacity of the machine can be installed freely several group and channel, each channel can be independent set to send and receive frequency, audio signal, the power of parameters, let users can be flexible network.
Comoandor (voice pressure expansion) using language pressure expansion technology, improve the sound quality, clear voice the ear.
To define function keys all function keys are independent programming, the user can define function on its own.
Kenwood interphone
Kenwood 2 way radio:
Using Flash ROM special software use memory can be replaced communication software work, make customer development special software and software upgrades into the future may be.
Super memory capacity of the machine can be installed freely several group and channel, each channel can be independent set to send and receive frequency, audio signal, the power of parameters, let users can be flexible network.
Comoandor (voice pressure expansion) using language pressure expansion technology, improve the sound quality, clear voice the ear.
To define function keys all function keys are independent programming, the user can define function on its own. CTCSS/DQT / 2 TONE this machine containing CTCSS/DQT / 2 TONE of the coding and decoding function, can be used as avoid with frequency interference and start transit, selected calling such use.
Luminous lighting night the monitor and the keyboard with crystal lighting, can be in night also can confirm that the contents and key that position.
Large LCD display screen and 128 channel model using eight 13 section monitor, which shows the letters and Numbers, clear and easy to read. Adjustable channel with future development national radio interval, the machine is fully considered the applicability of the future, through the programming can choose 25 kHz to 12.5 kHz channel between channel or interval.
The timer to prevent long time take channel, the machine can limit the launch of continuous setting.
Information pager (digital pager function) use three ID code + a + 3 ~ 5 middle yards a information code, DTMF coding way to information pager.
Using Flash ROM special software use memory can be replaced communication software work, make customer development special software and software upgrades into the future may be.
Super memory capacity of the machine can be installed freely several group and channel, each channel can be independent set to send and receive frequency, audio signal, the power of parameters, let users can be flexible network.
Comoandor (voice pressure expansion) using language pressure expansion technology, improve the sound quality, clear voice the ear.
To define function keys all function keys are independent programming, the user can define function on its own. CTCSS/DQT / 2 TONE this machine containing CTCSS/DQT / 2 TONE of the coding and decoding function, can be used as avoid with frequency interference and start transit, selected calling such use.
Luminous lighting night the monitor and the keyboard with crystal lighting, can be in night also can confirm that the contents and key that position.
Large LCD display screen and 128 channel model using eight 13 section monitor, which shows the letters and Numbers, clear and easy to read. Adjustable channel with future development national radio interval, the machine is fully considered the applicability of the future, through the programming can choose 25 kHz to 12.5 kHz channel between channel or interval.
The timer to prevent long time take channel, the machine can limit the launch of continuous setting.
Information pager (digital pager function) use three ID code + a + 3 ~ 5 middle yards a information code, DTMF coding way to information pager.
Kenwood 2-way radio
Kenwood 2 way radio:
Automatic response when the machine they receive the correct call signal after, can be a signal to call party response, including vibration ling sound, since a code, storage yards, three response signal for choice.
Dial-up function with manual dialing, dial again, shrinking a dial-up, automatic dial-up (single hand operation), and other functions.
Phone control code through the keyboard, can send out a/wireless connected online or offline password, at this time, the machine does not show the password, have a confidentiality role.
ANI function can store at most 16 a DTMF yards.
Variable audio CTCSS can temporarily change the channel has set the CTCSS frequency, flexible and convenient.
Static noise using the 3 DTMF code-10 DTMF coding signal way, when calling number and the machine’s Numbers consistent, static noise open circuit.
SMA antenna plug electric performance is better, improve the launch and receive efficiency.
DTMF function can realize ANI, selected calling, group called, and other functions, the convenient user network.
Support Smart Trunk Omni cluster system Smart Trunk Omni is a cheap and good digital signal cluster system, adopting PSK (phase shift keying) signaling way, has succeeded speed, high safety characteristics, and wireless Internet can. Add Smart Trunk logic board (option), can the built-in eight system, each system can be set at most 16 channel. Individual selected calling, group called the call with the machine and DTMF encoding/decoding components, can use DTMF code was selected calling individual, group called and all the call.
Automatic response when the machine they receive the correct call signal after, can be a signal to call party response, including vibration ling sound, since a code, storage yards, three response signal for choice.
Dial-up function with manual dialing, dial again, shrinking a dial-up, automatic dial-up (single hand operation), and other functions.
Phone control code through the keyboard, can send out a/wireless connected online or offline password, at this time, the machine does not show the password, have a confidentiality role.
ANI function can store at most 16 a DTMF yards.
Variable audio CTCSS can temporarily change the channel has set the CTCSS frequency, flexible and convenient.
Static noise using the 3 DTMF code-10 DTMF coding signal way, when calling number and the machine’s Numbers consistent, static noise open circuit.
SMA antenna plug electric performance is better, improve the launch and receive efficiency.
DTMF function can realize ANI, selected calling, group called, and other functions, the convenient user network.
Support Smart Trunk Omni cluster system Smart Trunk Omni is a cheap and good digital signal cluster system, adopting PSK (phase shift keying) signaling way, has succeeded speed, high safety characteristics, and wireless Internet can. Add Smart Trunk logic board (option), can the built-in eight system, each system can be set at most 16 channel. Individual selected calling, group called the call with the machine and DTMF encoding/decoding components, can use DTMF code was selected calling individual, group called and all the call.
Kenwood radio
Kenwood 2 way radio :
This machine is in order to prevent the busy channel interfere with others call it, has the function of the busy channel hair, users can customize the scanning of the channel.
Save electricity function without receiving state input signal, by reducing the receiving circuit in order to reduce power consumption work, so as to extend the use time of communication machine.
Low voltage alarm in use, when the battery voltage decreases, TX red leds flashing, says must be replaced batteries.
To take off the nets/fall frequency function to take off the nets function, sending and receiving the frequency. Fall frequency function, communication machine receive, launch frequency switch. Audio output power output of 500 mW, can drive 36 mm in diameter of speakers, make receiving signals more clear out loud.
Since Taiwan programming model since a 128 channels available programming, need not use external computer can set communication machine in a variety of functions and the channel’s data parameters, and convenient.
Computer programming using KPC-56 D programming software and KPC-22 programming cable set the frequency and function communication machine.
Online copy use interface cable, will all Settings from a communication machine transmitted a communication machine.
Other:
1. to guarantee a certain space, can install the other company options to board and signal processor plate;
2 .speakers/receiver terminals;
3.The installation strap with screw holes;
4 .analog switch;
5.The aluminum alloy die-casting frame five strong;
6 and the United States military standard MIL-STD810C, D, E corresponding, through the rain, moisture, dust, vibration and impact test.
This machine is in order to prevent the busy channel interfere with others call it, has the function of the busy channel hair, users can customize the scanning of the channel.
Save electricity function without receiving state input signal, by reducing the receiving circuit in order to reduce power consumption work, so as to extend the use time of communication machine.
Low voltage alarm in use, when the battery voltage decreases, TX red leds flashing, says must be replaced batteries.
To take off the nets/fall frequency function to take off the nets function, sending and receiving the frequency. Fall frequency function, communication machine receive, launch frequency switch. Audio output power output of 500 mW, can drive 36 mm in diameter of speakers, make receiving signals more clear out loud.
Since Taiwan programming model since a 128 channels available programming, need not use external computer can set communication machine in a variety of functions and the channel’s data parameters, and convenient.
Computer programming using KPC-56 D programming software and KPC-22 programming cable set the frequency and function communication machine.
Online copy use interface cable, will all Settings from a communication machine transmitted a communication machine.
Other:
1. to guarantee a certain space, can install the other company options to board and signal processor plate;
2 .speakers/receiver terminals;
3.The installation strap with screw holes;
4 .analog switch;
5.The aluminum alloy die-casting frame five strong;
6 and the United States military standard MIL-STD810C, D, E corresponding, through the rain, moisture, dust, vibration and impact test.
Police wireless radios
Police wireless 2 way radios are designed for public security, procuratorial, judicial, safety, court, customs, army, armed police eight department for wireless communications business contact with radio. National radio management departments in order to ensure the above special department communications business security, special planning out several group for its use frequency, frequency range from 350 to 390 MHz, of which 350 MHz to 370 MHz is mainly used for public security systems use. This period is called 350 MHz low frequency inline. 370 MHz to 390 MHz for other departments to use, this a frequency inline known as the 350 MHz high-end. This kind of radio 350 MHz collectively referred to as police radio. Because of the particularity of the police business, the use of the working environment, use requirements, and its communications business properties and other ordinary intercom or different. In addition to reliability, durable sex good, but also police radio to strong demand function, performance is superior, strong to strong, can shock, prevent bump, even light, easy to use, battery capacity, and standby time to long, some departments have special requirements, such as have communications confidential technology.
Police interphone are divided into conventional communication and cluster communication. And in the use of conventional communication, divided into specialized communication in use and the network in use. In the cluster communication also divided into MPT1327 signaling cluster system and other formats cluster system. The public security system in use is the most number of police radio.
Police interphone are divided into conventional communication and cluster communication. And in the use of conventional communication, divided into specialized communication in use and the network in use. In the cluster communication also divided into MPT1327 signaling cluster system and other formats cluster system. The public security system in use is the most number of police radio.
Bluetooth radio
Bluetooth 2 way radios, is a function of the radio with blue tooth, blue tooth adapter through interphone, use blue tooth headset to listen to radio receive speech information.
Working principle
1, launch part:
Phase ring and voltage control oscillation (VCO) produce launch rf carrier signal, after buffer amplifier, driver amplification, amplifiers, produce rated rf power, after antenna low-pass filter, suppress harmonic composition, and then through the antenna launch out.
2, receiving part:
Receiving part to second frequency conversion specialized superheterodyne way, from the input signal after sending and receiving antenna transform circuit and band pass filter rf after amplification, after band pass filter and into a frequency mixing, will come from rf signal from the amplification , phase lock loop of the circuit frequency synthesizer vibration signal of the first, in the first mixers place frequency mixing and produce the first intermediate frequency signal. The first intermediate frequency signal through the crystal filter to further eliminate clutter signal of adjacent to the word. After the first intermediate frequency signal of the filter into the intermediate frequency processing chip, and the second this vibration signal frequency mixing generation again the second intermediate frequency signal, the second intermediate frequency signal through a ceramic filters filter out useless stray signals, be amplified and popularly used, produce the audio signal. Audio signal through the amplification, band pass filter, to increase of circuit, into the volume control circuit and power amplifier amplification, drive the speaker, to get people to the required information.
3, a signal and modulation circuit:
The voice through the microphone converts audio electrical signal, audio signal through the amplifier circuit, the aggravating circuit and band pass filter into the vco directly modulation.
Working principle
1, launch part:
Phase ring and voltage control oscillation (VCO) produce launch rf carrier signal, after buffer amplifier, driver amplification, amplifiers, produce rated rf power, after antenna low-pass filter, suppress harmonic composition, and then through the antenna launch out.
2, receiving part:
Receiving part to second frequency conversion specialized superheterodyne way, from the input signal after sending and receiving antenna transform circuit and band pass filter rf after amplification, after band pass filter and into a frequency mixing, will come from rf signal from the amplification , phase lock loop of the circuit frequency synthesizer vibration signal of the first, in the first mixers place frequency mixing and produce the first intermediate frequency signal. The first intermediate frequency signal through the crystal filter to further eliminate clutter signal of adjacent to the word. After the first intermediate frequency signal of the filter into the intermediate frequency processing chip, and the second this vibration signal frequency mixing generation again the second intermediate frequency signal, the second intermediate frequency signal through a ceramic filters filter out useless stray signals, be amplified and popularly used, produce the audio signal. Audio signal through the amplification, band pass filter, to increase of circuit, into the volume control circuit and power amplifier amplification, drive the speaker, to get people to the required information.
3, a signal and modulation circuit:
The voice through the microphone converts audio electrical signal, audio signal through the amplifier circuit, the aggravating circuit and band pass filter into the vco directly modulation.
Handheld radio
Armed with interphone, used communication equipment. 2 way radio is different from mobile phones, it need not according to call time billing. More mobile phones and two-way radios cost, users will find more economical and practical intercom.
The working principle of handheld radio:
1.launch part:
Phase lock loop and voltage control oscillation (VCO) produce launch rf carrier signal, after buffer amplifier, driver amplification, amplifiers, produce rated rf power, after antenna low-pass filter, suppress harmonic composition, and then through the antenna launch out.
2, receiving part:
Receiving part to second frequency conversion specialized superheterodyne way, from the input signal after sending and receiving antenna transform circuit and band pass filter rf after amplification, after band pass filter and into a frequency mixing, will come from rf signal from the amplification and phase lock loop of the circuit frequency synthesizer vibration signal of the first ,in the first mixers place frequency mixing and produce the first intermediate frequency signal. The first intermediate frequency signal through the crystal filter to further eliminate clutter signal of adjacent to the word. After the first intermediate frequency signal of the filter into the intermediate frequency processing chip, and the second this vibration signal frequency mixing generation again the second intermediate frequency signal, the second intermediate frequency signal through a ceramic filters filter out useless stray signals, be amplified and popularly used, produce the audio signal.
3,modulation signal and modulation circuit:
The voice through the microphone converts audio electrical signal, audio signal through the amplifier circuit, the aggravating circuit and band pass filter into the vco directly modulation.
4.signal processing:
CPU produce CTCSS/DTCSS signal amplified adjustment, into the vco for modulation. After receiving is popularly used get low frequency signal, and part of the amplified and the audio band pass filter for filter plastic, into the CPU, and the value is used in the comparison, will the results control the output of the audio power amplifier and speakers.
The working principle of handheld radio:
1.launch part:
Phase lock loop and voltage control oscillation (VCO) produce launch rf carrier signal, after buffer amplifier, driver amplification, amplifiers, produce rated rf power, after antenna low-pass filter, suppress harmonic composition, and then through the antenna launch out.
2, receiving part:
Receiving part to second frequency conversion specialized superheterodyne way, from the input signal after sending and receiving antenna transform circuit and band pass filter rf after amplification, after band pass filter and into a frequency mixing, will come from rf signal from the amplification and phase lock loop of the circuit frequency synthesizer vibration signal of the first ,in the first mixers place frequency mixing and produce the first intermediate frequency signal. The first intermediate frequency signal through the crystal filter to further eliminate clutter signal of adjacent to the word. After the first intermediate frequency signal of the filter into the intermediate frequency processing chip, and the second this vibration signal frequency mixing generation again the second intermediate frequency signal, the second intermediate frequency signal through a ceramic filters filter out useless stray signals, be amplified and popularly used, produce the audio signal.
3,modulation signal and modulation circuit:
The voice through the microphone converts audio electrical signal, audio signal through the amplifier circuit, the aggravating circuit and band pass filter into the vco directly modulation.
4.signal processing:
CPU produce CTCSS/DTCSS signal amplified adjustment, into the vco for modulation. After receiving is popularly used get low frequency signal, and part of the amplified and the audio band pass filter for filter plastic, into the CPU, and the value is used in the comparison, will the results control the output of the audio power amplifier and speakers.
Digital radio
Digital 2 way radio is the digital technology to design digital radio. Digital radio is to speech signal digital, with the digital code spread form, that is, radio frequency transmission all of the modulation are digital. Only directly uses the digital signal processor intercom is the real meaning of the Numbers on the intercom, and use digital control signal interphone (such as cluster system intercom) does not belong to the digital radio. Digital radio has many advantages, it is can better use of spectrum resources, and the cellular digital technology similar, digital radio can be a designated in the channel such as 25 KHZ carry more users, improve spectrum efficiency, this is a kind of solving frequency crowded solutions, has long-term significance.
Second is to improve the voice quality. As digital communication technology in the system function with error correction, and than analog interphone, can be in a range of signal environment more widely, achieve better speech audio quality, its reception to audio noise will be more less, the voice more clearly.
The last point is, increase and improve the voice and data integration, change control signal communication distance increases with the decrease of weakness, and similar integrated analog voice and data than system, digital radio can provide better data processing and interface function, so as to make more data applications can be integrated into the same two-way wireless communication station structure of voice and data services to integrated more perfect and more convenient.
Second is to improve the voice quality. As digital communication technology in the system function with error correction, and than analog interphone, can be in a range of signal environment more widely, achieve better speech audio quality, its reception to audio noise will be more less, the voice more clearly.
The last point is, increase and improve the voice and data integration, change control signal communication distance increases with the decrease of weakness, and similar integrated analog voice and data than system, digital radio can provide better data processing and interface function, so as to make more data applications can be integrated into the same two-way wireless communication station structure of voice and data services to integrated more perfect and more convenient.
Digital radio principle
The basic principle of digital 2 way radio is first the analog voice converted into digital signals, then modulation to rf go up. Since the launch of the digital signals, of course, this machine also can be directly transmit data. The appearance of digital radio is also in order to save the radio spectrum, so the current digital radio is mostly a voice channel equivalent occupy 6.25 kHzk bandwidth, namely than general analog interphone save half frequency.
Different digital radio is the practice of different standards. ICOM digital radios used by the dPMR formats and the United States do the old version of the type that used frequency division way (FDMA), a 12.5 kHz from frequency to two bandwidth for 6.25 kHz channel, and Europe and the United States do DMR system is adopted the new version of time (TDMA) way (MOTOROLA and shenzhen sea can reach and other production such products), a 12.5 kHz channel from the time is divided into two cross time piece, the transmit a channel. The latter has more advantages, such as a repeater can also relay two channel, and such as general interphone press PTT others cannot put it after stopped, and TDMA systems on the press PTT is really after the launch of the intermittent, in particular in an emergency, can takes up time out of A B channel and signaling, forcibly shut off the radio signal emission occupy A.
Different digital radio is the practice of different standards. ICOM digital radios used by the dPMR formats and the United States do the old version of the type that used frequency division way (FDMA), a 12.5 kHz from frequency to two bandwidth for 6.25 kHz channel, and Europe and the United States do DMR system is adopted the new version of time (TDMA) way (MOTOROLA and shenzhen sea can reach and other production such products), a 12.5 kHz channel from the time is divided into two cross time piece, the transmit a channel. The latter has more advantages, such as a repeater can also relay two channel, and such as general interphone press PTT others cannot put it after stopped, and TDMA systems on the press PTT is really after the launch of the intermittent, in particular in an emergency, can takes up time out of A B channel and signaling, forcibly shut off the radio signal emission occupy A.
Network radio
Based on network TCP/IP protocol transmission of the interaction of 2 way radio equipment.
Family personal communications, enterprise group communication, office, shopping mall, ATM, hardware, the self-service banking, etc have network and need to call at any time, the intercom place.
Functions, features:
Through the LAN/WAN (LAN/WAN) transmission, achieve global remote calls.
Zero call charges. Through the network transmission, call process, any party won’t produce cost.
Easy installation, equipped with RJ45 standard cable, insert the router LAN end (or a switch) any port can work.
Into the nations to independent intellectual property rights of the digital audio and video technology, hands-free two-way communication higher audio sampling rate, and the talking better sound quality.
The two parties may call each other and the intercom, the volume can be adjusted. Call, a ringing hint sound.
Host a surveillance extension function. Monitor, extension place without any perceived (such as the need to prevent surveillance, can match the IP network security extension). With network instructions and work instructions, but external headset.
But through the wireless access network, realize the wireless phone (need custom).
A function call confidential. The transmission of data encryption, in order to prevent others use eavesdropping, make calls more secure.
Family personal communications, enterprise group communication, office, shopping mall, ATM, hardware, the self-service banking, etc have network and need to call at any time, the intercom place.
Functions, features:
Through the LAN/WAN (LAN/WAN) transmission, achieve global remote calls.
Zero call charges. Through the network transmission, call process, any party won’t produce cost.
Easy installation, equipped with RJ45 standard cable, insert the router LAN end (or a switch) any port can work.
Into the nations to independent intellectual property rights of the digital audio and video technology, hands-free two-way communication higher audio sampling rate, and the talking better sound quality.
The two parties may call each other and the intercom, the volume can be adjusted. Call, a ringing hint sound.
Host a surveillance extension function. Monitor, extension place without any perceived (such as the need to prevent surveillance, can match the IP network security extension). With network instructions and work instructions, but external headset.
But through the wireless access network, realize the wireless phone (need custom).
A function call confidential. The transmission of data encryption, in order to prevent others use eavesdropping, make calls more secure.
Two-way radio
2 way radios, its covers a wide range. Here, we will work in ultrashort wave frequency band (VHF30 ~ 300 MHZ, UHF300 ~ 3000 MHZ) radio communication equipment commander-in-chief called radios. According to the state’s relevant actually standard should be called ultrashort wave frequency modulation wireless telephone, people usually will power small, small hand-held wireless telephone is called “radio”, there was people call it “Walkie Talkie “, and will power is great, the volume greater served in car (ship), and other traffic tools or fixed use wireless telephone, also called “the radio”, such as the Taiwan (the machine), Marine platform, fixed platform, base stations, such as the turntable.
Radios used by man is the earliest of the wireless communication equipment, in the early 1930s began to be applied. In 1936 the United States MOTOROLA company developed the first portable radio communication products-” patrol “brand for an am radio receiver, followed in 1940 and for the United States army transport developed the first to weigh 2.2 kilograms handheld two-way radio an am radio, communication distance of 1.6 km. By 1962, MOTOROLA and launched the first weighs only 33 ounces of handheld wireless radios HT200, its appearance called “brick”, size and early mobile phone mobile phone almost. After nearly three-quarters of a century on the development of the application has become widespread, already from professional field to ordinary consumption, from military to civilian expansion.
Radios used by man is the earliest of the wireless communication equipment, in the early 1930s began to be applied. In 1936 the United States MOTOROLA company developed the first portable radio communication products-” patrol “brand for an am radio receiver, followed in 1940 and for the United States army transport developed the first to weigh 2.2 kilograms handheld two-way radio an am radio, communication distance of 1.6 km. By 1962, MOTOROLA and launched the first weighs only 33 ounces of handheld wireless radios HT200, its appearance called “brick”, size and early mobile phone mobile phone almost. After nearly three-quarters of a century on the development of the application has become widespread, already from professional field to ordinary consumption, from military to civilian expansion.
Radios
2 way radios is a professional in the mobile wireless communication tools, it is a kind of can satisfy people life need and has the characteristics of the consumer products consumption tool. Just as its name implies the mobile communication is a party and communication to the other party in moving realize communication. It includes mobile users to mobile users, mobile users to fixed user, and then it also includes the fixed users to fixed user communication between contact, radios mobile communication is an important branch of the radio.
It is a kind of wireless can be used in mobile communication point-to-multipoint the terminal equipment, can make many people at each other, so that many people can also hear the same person to talk, but at the same time there can only be a person to speak. This sort of communication and other means of communication have different characteristics: instant communication, shout should, economical and practical, operating costs low, do not spend call charges, save the easy to use, but also has group called the sowing, system call, and confidential calls etc. Function. In dealing with emergencies, in the role of scheduling command is other communication tools cannot replace. Radios and other wireless communication tools (such as mobile phone) its market positioning each are not identical, difficult to replace each other.
It is a kind of wireless can be used in mobile communication point-to-multipoint the terminal equipment, can make many people at each other, so that many people can also hear the same person to talk, but at the same time there can only be a person to speak. This sort of communication and other means of communication have different characteristics: instant communication, shout should, economical and practical, operating costs low, do not spend call charges, save the easy to use, but also has group called the sowing, system call, and confidential calls etc. Function. In dealing with emergencies, in the role of scheduling command is other communication tools cannot replace. Radios and other wireless communication tools (such as mobile phone) its market positioning each are not identical, difficult to replace each other.
MOTOROLA GP3688 radio
GP3688 2 way radio meet 11 American standard, in a harsh environment can still security in real-time, and reliable communications. Strong audio output to guarantee a noise environment unimpeded communications, excellent rf index and voice pressure expansion can reduce the high volume function of audio distortion. The SDT1200 signaling GP3688 interphone can fully satisfy the railway transport, enterprise security protection, forestry, logistics center management, service industry and building manufacturing industries of the application requirements. GP3688 have strong quality, special data function and more humanized design, accord with the practical application of domestic users environment and the work characteristics.
The prominent characteristics of GP3688:
Signaling – DTMF
Options to board-have
Keyboard-no
Screen-no
The emergency call button-no
The battery life-10 hours (high power), 13 hours (low power)-using standard nimh batteries
The United States military standard-the United States military standard 810 C, D, and E
Essence safety-no
Weight (g/kg)-437 g (with standard nimh batteries)
The output power-1-4 W (UHF)
Frequency-403-440 MHz, 438-470 MHz
Channel capacity-16
Shape dimension (long X wide X thick)-126.5 mm X 61.5 mm X 43 mm (with standard nimh batteries)
Incomparable voice quality
The MOTOROLA compandingTM technology, can provide the sound and more clear loud voice quality, even in noisy environment, can also listen to clear the intercom news.
The prominent characteristics of GP3688:
Signaling – DTMF
Options to board-have
Keyboard-no
Screen-no
The emergency call button-no
The battery life-10 hours (high power), 13 hours (low power)-using standard nimh batteries
The United States military standard-the United States military standard 810 C, D, and E
Essence safety-no
Weight (g/kg)-437 g (with standard nimh batteries)
The output power-1-4 W (UHF)
Frequency-403-440 MHz, 438-470 MHz
Channel capacity-16
Shape dimension (long X wide X thick)-126.5 mm X 61.5 mm X 43 mm (with standard nimh batteries)
Incomparable voice quality
The MOTOROLA compandingTM technology, can provide the sound and more clear loud voice quality, even in noisy environment, can also listen to clear the intercom news.
Building interphone
Building 2 way radio:
Extension of traditional talkback extension structure is divided into extension base and extension the handle.
A,Extension base main functions: fixed position extension, extension base have screws bits (according to different manufacturer, is directly through the extension of the screw hole installed base, also have an extension through the back-plane behind in extension for installation). In the extension base (or manufacturers in the extension of the installation has a terminals, used to connect the cable from the host-extension. Extension base have internal circuit board, the extension of control function.
B, extension handle: extension handle internal have speakers and microphones head, used to receive a speech and send voice.
The extension will face case with multiple key, according to an extension the function different, the number keys will change, but the most basic function keys is indispensable. Such as: the lock buttons, call button. The lock button main function is to host call extension, extension through this button at the door open electric lock; Call button mainly in digital networking system, the press the call button residents extension, management center can display the resident room number.
Management center machine: management center machine is installed in the community management center of call the intercom equipment, control the security door lock the opening of the electronic control unit.
Extension of traditional talkback extension structure is divided into extension base and extension the handle.
A,Extension base main functions: fixed position extension, extension base have screws bits (according to different manufacturer, is directly through the extension of the screw hole installed base, also have an extension through the back-plane behind in extension for installation). In the extension base (or manufacturers in the extension of the installation has a terminals, used to connect the cable from the host-extension. Extension base have internal circuit board, the extension of control function.
B, extension handle: extension handle internal have speakers and microphones head, used to receive a speech and send voice.
The extension will face case with multiple key, according to an extension the function different, the number keys will change, but the most basic function keys is indispensable. Such as: the lock buttons, call button. The lock button main function is to host call extension, extension through this button at the door open electric lock; Call button mainly in digital networking system, the press the call button residents extension, management center can display the resident room number.
Management center machine: management center machine is installed in the community management center of call the intercom equipment, control the security door lock the opening of the electronic control unit.
Building two-way radio
According to the extension of their functions extension can be divided into wall hung extension and embedded extension two kinds 2 way radios.
A, wall hung extension: extension installation for Ming outfit, mainly through the extension of the screws on the base or a fixed installation back-plane of fixed and metope after installation extension. Wall hung extension convenient installation, but an extension itself more prominent metope, visual effect is not good. Because of its volume of the restrictions, internal can’t load many function module (some loading function modules is a simplified module);
B, embedded extension: extension installation for dark outfit, first the embedded bottom box extension bury a wall installation, again will be fixed in the bottom of the embedded extension on the box. After installation embedded extension with metope basic height consistent, for indoor whole visual effect is very good. Plus, because of embedded installation extension have larger space, can load more function expansion; Its shortcomings need for dark bury bottom box, construction difficult, and after the installation is not easy for mobile;
C, new products: super-thin wall hung extension: due to the above two and the advantages and disadvantages of the extension, such extension of traditional wall hung than average extension thin (the traditional wall hung by the receiver design, visual extension in part due to a black and white screen, so need compatible beyond metope altitude generally in more than 40 MM thickness, basic can’t then to reduce). New type wall hung extension generally USES hands-free calls technology, visual part adopts color LCD screen
A, wall hung extension: extension installation for Ming outfit, mainly through the extension of the screws on the base or a fixed installation back-plane of fixed and metope after installation extension. Wall hung extension convenient installation, but an extension itself more prominent metope, visual effect is not good. Because of its volume of the restrictions, internal can’t load many function module (some loading function modules is a simplified module);
B, embedded extension: extension installation for dark outfit, first the embedded bottom box extension bury a wall installation, again will be fixed in the bottom of the embedded extension on the box. After installation embedded extension with metope basic height consistent, for indoor whole visual effect is very good. Plus, because of embedded installation extension have larger space, can load more function expansion; Its shortcomings need for dark bury bottom box, construction difficult, and after the installation is not easy for mobile;
C, new products: super-thin wall hung extension: due to the above two and the advantages and disadvantages of the extension, such extension of traditional wall hung than average extension thin (the traditional wall hung by the receiver design, visual extension in part due to a black and white screen, so need compatible beyond metope altitude generally in more than 40 MM thickness, basic can’t then to reduce). New type wall hung extension generally USES hands-free calls technology, visual part adopts color LCD screen
Building radio
Building 2 way radios are installed in the building of the entrance guard against theft, choose the intercom control device. Host general installation in each unit at the entrance of the gate of the house of guard against theft or near the wall, the host of the panel, including box, operation, audio, video part of parts, control parts.
According to the extension of their functions:
A,The visual extension: the major function for the reception of the call, and calls, the lock, call management center
B, visual extension: the major function for the reception of the call, and calls, the lock, call management center, the receiving host image
C, multi-function extension: the above two for the extension and visual basic intercom extension, at present the market products in the function of the extension enhancement, the main value-added features include:
a, indoor alarm: extension can control indoor alarm detector in the module, the fortification, according to indoor probe removal operation and management center to alarm;
b, image storage: visual extension have internal image storage module, but the video signal to host manual and automatic storage and playback; (our currently does not have this function)
c, information release: extension can receive a residential property management center released information, the type of display that commonly there are two ways: a visual display of the extension for through the show; Another for extension equipment have LED LCD screen, information can be in the extension of the LED display on display.
According to the extension of their functions:
A,The visual extension: the major function for the reception of the call, and calls, the lock, call management center
B, visual extension: the major function for the reception of the call, and calls, the lock, call management center, the receiving host image
C, multi-function extension: the above two for the extension and visual basic intercom extension, at present the market products in the function of the extension enhancement, the main value-added features include:
a, indoor alarm: extension can control indoor alarm detector in the module, the fortification, according to indoor probe removal operation and management center to alarm;
b, image storage: visual extension have internal image storage module, but the video signal to host manual and automatic storage and playback; (our currently does not have this function)
c, information release: extension can receive a residential property management center released information, the type of display that commonly there are two ways: a visual display of the extension for through the show; Another for extension equipment have LED LCD screen, information can be in the extension of the LED display on display.
Counter radio
Now on the counter is mainly can be divided into plastic, metal, and half pure metal materials three, with the development of society, believe pure metal window 2 way radio in the near future will become mainstream, and instead of before two kinds. Our company is the first production of metal on the counter all manufacturers, for many years we provide the best quality products and the most humanized service, to create the counter on the industry first-class brand.
For many years, a large number of installation and use the experience, make our product series perfect, and can satisfy the customers’ different requirements of different industries, and can be customized to design special working environment need portfolio of products.
Pure metal products advantages
The view: the high purity, light special metal materials; Modeling noble generous, satisfies the high end user needs; Clean the surface of life can: the humanized design, allowing the teller large scale activities; Automatic channel control function, and eliminate the self-excited screaming; Call volume two-way constant; Quality natural, fidelity, maintain maximum comprehensible; With synchronous recording function;
Special performance: the recording can we measure or define: monitoring the tape from sound volume required size affect volume stability; Without electricity recording: even turn off the radio “switch”, the machine can still recording
For many years, a large number of installation and use the experience, make our product series perfect, and can satisfy the customers’ different requirements of different industries, and can be customized to design special working environment need portfolio of products.
Pure metal products advantages
The view: the high purity, light special metal materials; Modeling noble generous, satisfies the high end user needs; Clean the surface of life can: the humanized design, allowing the teller large scale activities; Automatic channel control function, and eliminate the self-excited screaming; Call volume two-way constant; Quality natural, fidelity, maintain maximum comprehensible; With synchronous recording function;
Special performance: the recording can we measure or define: monitoring the tape from sound volume required size affect volume stability; Without electricity recording: even turn off the radio “switch”, the machine can still recording
2012年12月24日星期一
Matters needing attention of two way radio
1.When 2 way radio is sending out, keep it in a vertical position, and keep 3-5 cm distance between the microphone and mouth.Two way radio distances head or body at least 2.5 cm in the emission. If the handheld radio carries on the body, the antenna should distance human at least 2.5 cm.
2.In the use ,do not carry on many times the starting and close-down action.At the same time, adjust volume to suit your listening volume.
3.Don’t change two way radio parameter Settings, or it may cause disorder of frequency and function, and cause the radio can’t be used normally. It will bring some unnecessary trouble to our maintenance engineer.
4.Only use original configuration or approved antenna. Unauthorized antenna, modified or add the attachment to the antenna may damage the radio or be against the provisions of the ministry of information industry and the radio administration.
5.When uses, do not use hand to take the antenna, and cannot carry it to move the machine here and there.
6.When uses,the antenna of radio can’t unscrew, otherwise it will easily damage the internal device in the emission.
7.Do not use the damaged antenna. In the emission, if the damaged antenna contacts skin, it may cause slight burn.
8.The antenna of radio matches up to the frequency of host.Do not use the antenna which does not match up to the host frequency band.Because this might damage the radio or make communication effect bad.
2.In the use ,do not carry on many times the starting and close-down action.At the same time, adjust volume to suit your listening volume.
3.Don’t change two way radio parameter Settings, or it may cause disorder of frequency and function, and cause the radio can’t be used normally. It will bring some unnecessary trouble to our maintenance engineer.
4.Only use original configuration or approved antenna. Unauthorized antenna, modified or add the attachment to the antenna may damage the radio or be against the provisions of the ministry of information industry and the radio administration.
5.When uses, do not use hand to take the antenna, and cannot carry it to move the machine here and there.
6.When uses,the antenna of radio can’t unscrew, otherwise it will easily damage the internal device in the emission.
7.Do not use the damaged antenna. In the emission, if the damaged antenna contacts skin, it may cause slight burn.
8.The antenna of radio matches up to the frequency of host.Do not use the antenna which does not match up to the host frequency band.Because this might damage the radio or make communication effect bad.
Management regulations of two way radio
Purpose:
To regulate the use and management of radio, make each department communicate information easily and improve work efficiency.
Management regulations
1.Use the 2 way radio and attachment according to stipulate numbers. Check the frequency of 2 way radio (unified into four frequency), electricity, headset,and call response before use.The front office is responsible to train user unified.
2.Do not lend the 2 way radio to others.Don’t touch and remove the antenna and don’t use the antenna when it is damaged.Don’t use the metal object to touch the bare electrode of battery.When a fault happens,please report to the direct principal and fill in a guarantee. The front office will make a record .Do not overhaul it by yourself. Someone uses it ,he will be responsible for it.And if someone damages and loses it ,he will compensate it. It is the principle of disposing the relevant responsible persons.
3.Relevant departments shall specify the related management researchers to use the 2 way radio.
4.Keep the 2 way radio working at working time.If the indicator light is red and no reply in use, it is needed to change battery or charge.
5.Charge in unwork condition.When the 2 way radio is idle ,it should be placed in not power charging seat, and the headset should be winding specification.
6.In charging:(1)Indicator light is red, if it is scintillating, it shall be reset. It is still scintillating after reset ,it means that the battery has a breakdown. Front office should make a record and set it aside ,and take it to the engineering department to repair .(2)The indicator light is green when electricity is full.
To regulate the use and management of radio, make each department communicate information easily and improve work efficiency.
Management regulations
1.Use the 2 way radio and attachment according to stipulate numbers. Check the frequency of 2 way radio (unified into four frequency), electricity, headset,and call response before use.The front office is responsible to train user unified.
2.Do not lend the 2 way radio to others.Don’t touch and remove the antenna and don’t use the antenna when it is damaged.Don’t use the metal object to touch the bare electrode of battery.When a fault happens,please report to the direct principal and fill in a guarantee. The front office will make a record .Do not overhaul it by yourself. Someone uses it ,he will be responsible for it.And if someone damages and loses it ,he will compensate it. It is the principle of disposing the relevant responsible persons.
3.Relevant departments shall specify the related management researchers to use the 2 way radio.
4.Keep the 2 way radio working at working time.If the indicator light is red and no reply in use, it is needed to change battery or charge.
5.Charge in unwork condition.When the 2 way radio is idle ,it should be placed in not power charging seat, and the headset should be winding specification.
6.In charging:(1)Indicator light is red, if it is scintillating, it shall be reset. It is still scintillating after reset ,it means that the battery has a breakdown. Front office should make a record and set it aside ,and take it to the engineering department to repair .(2)The indicator light is green when electricity is full.
2 way radio’s effective distance
Generally, communication distance within 2-3 km can be regarded as the short distance communication. For the individual user, they can choose the civil 2 way radio.For unit users,they can choose small power 2 way radio through application. If in order to guarantee the communication effect, they can choose professional conventional 2 way radio. If it needs communicating in the city range and communication distance within 3 to 10 km, users can consider to buy professional radio.If it is farer, users had better use base stations and handheld 2 way radio to communicate, or use vehicular stations and vehicular station communication base stations. Users also can use the vehicular 2 way radio that its output power is bigger.
If users need to communicate in further distance or better communication quality without networking, they can consider to use cluster 2 way radio.Cluster radio has wireless network support, so its communication distance is farer, and its effective distance is within 15-30 km.Due to this 2 way radio needs for network support, so if the 2 way radio takes off the net, it is like mobile phone that takes off the net. Even if both sides talk face to face ,it still cannot communicate.
1.Handheld 2 way radio
5 watts / 4 watts emission power: urban 1-3 km, the open place 3-5 km;
3 watts / 2 watts emission power: urban 0.5-2 km, the open place 1-3 km;
1 watts / 0.5 watts emission power: urban 0.2-20.8km, the open place 0.5-1.5km.
2.vehicular 2 way radio
50 watts / 40 watts emission power: urban 5-15 km, the open place 10-25 km;
25 watts / 20 watts emission power: urban 3-10 km, the open place 5-15 km;
10 watts / 5 watts emission power: urban 1-5km, the open place 3-8km.
If users need to communicate in further distance or better communication quality without networking, they can consider to use cluster 2 way radio.Cluster radio has wireless network support, so its communication distance is farer, and its effective distance is within 15-30 km.Due to this 2 way radio needs for network support, so if the 2 way radio takes off the net, it is like mobile phone that takes off the net. Even if both sides talk face to face ,it still cannot communicate.
1.Handheld 2 way radio
5 watts / 4 watts emission power: urban 1-3 km, the open place 3-5 km;
3 watts / 2 watts emission power: urban 0.5-2 km, the open place 1-3 km;
1 watts / 0.5 watts emission power: urban 0.2-20.8km, the open place 0.5-1.5km.
2.vehicular 2 way radio
50 watts / 40 watts emission power: urban 5-15 km, the open place 10-25 km;
25 watts / 20 watts emission power: urban 3-10 km, the open place 5-15 km;
10 watts / 5 watts emission power: urban 1-5km, the open place 3-8km.
The treatment methods of 2 way radio that water was in it
1.Firstly , pull the battery out and take the 2 way radio host apart,including antenna, machine box, circuit boards, conductive rubber, buttons, guide pillar and so on.
2.Clear antenna and conductive rubber button with anhydrous alcohol ,and place it in the air to dry.
3.Just need to blow dry the speaker and microphone under the hair dryer,because the speaker and microphone should not soak with the anhydrous alcohol .
4.Use a reedy tool to remove dirt in each integrated block and platoon line, then soak circuit board with anhydrous alcohol(if condition allows, it can use ultrasonic cleaning machine to clear).Use a soft brush to clear, put it in ventilated place and use hair dryer to blow dry. Pay attention that the temperature of the dryer not too high .Users can put hands on the circuit board.if hands can bear,it means that the temperature is OK.Then check the circuit board wounded or not.If there is a break,connect it with thin wire , and measure power positive and negative resistance of plate with avometer.It should not be short circuit or open circuit(charge with electricity and view current,it is about 40 ma in normal.It cannot be less than 1000 ma in the emission.).
5.Finally, check the wireless mouth dirty or not and clear it if it is dirty.At the same time ,cheek and repair routinely if there are other fault.For the 2 way radio that water was in i,if its circuit is corroded seriously, it will cannot repair. So it should deal with the machine that water was in it in time.
2.Clear antenna and conductive rubber button with anhydrous alcohol ,and place it in the air to dry.
3.Just need to blow dry the speaker and microphone under the hair dryer,because the speaker and microphone should not soak with the anhydrous alcohol .
4.Use a reedy tool to remove dirt in each integrated block and platoon line, then soak circuit board with anhydrous alcohol(if condition allows, it can use ultrasonic cleaning machine to clear).Use a soft brush to clear, put it in ventilated place and use hair dryer to blow dry. Pay attention that the temperature of the dryer not too high .Users can put hands on the circuit board.if hands can bear,it means that the temperature is OK.Then check the circuit board wounded or not.If there is a break,connect it with thin wire , and measure power positive and negative resistance of plate with avometer.It should not be short circuit or open circuit(charge with electricity and view current,it is about 40 ma in normal.It cannot be less than 1000 ma in the emission.).
5.Finally, check the wireless mouth dirty or not and clear it if it is dirty.At the same time ,cheek and repair routinely if there are other fault.For the 2 way radio that water was in i,if its circuit is corroded seriously, it will cannot repair. So it should deal with the machine that water was in it in time.
Applicable people of MOTOROLA 2 way radio
Mining industry
Whether coal mine or diamond mine, If you work in underground gallery that there is dust and shock noise, you only need to touch a call key gently , MOTOROLA professional 2 way radio can communicate with the outside world for you.
Airport
Whether security, duty personnel, dispatcher, or flight crew in the airport realize profoundly that using MOTOROLA professional 2 way radio is convenience. MOTOROLA professional 2 way radio what is Strengthening designed brings higher efficiency and more perfect operation for airport scheduling.It specially strengthens contact between the airport control center and freight station, maintenance, passenger , avoiding the waste of manpower, machinery and time. In an emergency, MOTOROLA 2 way radio can also send signals to help to coordinate all kinds of complicated situations.
Building trade
MOTOROLA professional 2 way radio what is Strengthening designed brings higher efficiency and more perfect security. Whether commanding crane or scheduling a pipeline carrying, you can always control the whole situation.Press a button, you will contact with the project manager instantly. If it is necessary, it can even contact to the hospital ,and it will strengthen to avoid the accident happening.
Oil field
If the routine operations that put out blowout and fire or offshore oil refinery happen any life-threatening condition, you can rely on MOTOROLA professional 2 way radio.The strengthening design stands up to the most rigorous drilling conditions.You can even be free hands to gain greater flexibility through the head microphone or headset accessories.
Whether coal mine or diamond mine, If you work in underground gallery that there is dust and shock noise, you only need to touch a call key gently , MOTOROLA professional 2 way radio can communicate with the outside world for you.
Airport
Whether security, duty personnel, dispatcher, or flight crew in the airport realize profoundly that using MOTOROLA professional 2 way radio is convenience. MOTOROLA professional 2 way radio what is Strengthening designed brings higher efficiency and more perfect operation for airport scheduling.It specially strengthens contact between the airport control center and freight station, maintenance, passenger , avoiding the waste of manpower, machinery and time. In an emergency, MOTOROLA 2 way radio can also send signals to help to coordinate all kinds of complicated situations.
Building trade
MOTOROLA professional 2 way radio what is Strengthening designed brings higher efficiency and more perfect security. Whether commanding crane or scheduling a pipeline carrying, you can always control the whole situation.Press a button, you will contact with the project manager instantly. If it is necessary, it can even contact to the hospital ,and it will strengthen to avoid the accident happening.
Oil field
If the routine operations that put out blowout and fire or offshore oil refinery happen any life-threatening condition, you can rely on MOTOROLA professional 2 way radio.The strengthening design stands up to the most rigorous drilling conditions.You can even be free hands to gain greater flexibility through the head microphone or headset accessories.
ATIS VHF 2 way radio——your questions answered
What is ATIS?
ATIS stands for Automatic Transmitter Identification System. This system is used on inland waterways in a number of countries in mainland Europe. A unique FFSK data signal is sent out at the end of each voice transmission, containing the vessel’s unique callsign, identifying you to marine coast stations and inland stations.
Can Entel supply me with an ATIS 2 way radio?
Yes. The Entel range of marine radios includes the HT644 VHF ATIS radio, together with intrinsically safe variants, HT844 and HT944. You must tell your dealer that you require the ATIS feature. The ATIS information is dealer programmable, or can be programmed by Entel, prior to supply, if you send your dealer the required information. This includes:
1.Vessel MMSI (Maritime Mobile Service Identity) number
2.Vessel name
3.Vessel callsign
How do I use the ATIS feature?
Your Entel ATIS radio contains the usual sets of marine channels, including those used in European coastal waters, the USA and Canada, but in addition, includes an additional channel set for ATIS. The ATIS feature is enabled on your handheld radio whilst the ATIS group is selected (see operator’s manual supplied with the radio, or download from the Downloads section of this website). No additional programming will be required upon entering or leaving mainland European waters – the ATIS feature is either selected on your radio, or not selected. For a list of ATIS participating countries, see the list at the end of the next section.
ATIS stands for Automatic Transmitter Identification System. This system is used on inland waterways in a number of countries in mainland Europe. A unique FFSK data signal is sent out at the end of each voice transmission, containing the vessel’s unique callsign, identifying you to marine coast stations and inland stations.
Can Entel supply me with an ATIS 2 way radio?
Yes. The Entel range of marine radios includes the HT644 VHF ATIS radio, together with intrinsically safe variants, HT844 and HT944. You must tell your dealer that you require the ATIS feature. The ATIS information is dealer programmable, or can be programmed by Entel, prior to supply, if you send your dealer the required information. This includes:
1.Vessel MMSI (Maritime Mobile Service Identity) number
2.Vessel name
3.Vessel callsign
How do I use the ATIS feature?
Your Entel ATIS radio contains the usual sets of marine channels, including those used in European coastal waters, the USA and Canada, but in addition, includes an additional channel set for ATIS. The ATIS feature is enabled on your handheld radio whilst the ATIS group is selected (see operator’s manual supplied with the radio, or download from the Downloads section of this website). No additional programming will be required upon entering or leaving mainland European waters – the ATIS feature is either selected on your radio, or not selected. For a list of ATIS participating countries, see the list at the end of the next section.
GMDSS 2 way radios roll out
Entel’s award-winning marine 2 way radio has long been used by commercial shipping fleets worldwide, but until now we were unable to offer GMDSS radios often requested by those already using our other marine 2 way radios at sea. Now we are pleased to announce the launch of our MED certified GMDSS range of radios, all of which carry the essential Wheel Mark and comply with IMO regulations.
These 2 way radios can come with or without a high–visibility LCD screen and uniquely – intrinsically safe variants will follow shortly (both ATEX and USTC certification is available), for those operating portable radios in hazardous environments. As it is mandatory for vessels carrying hazardous cargoes to use intrinsically safe radios, we believe that their GMDSS radios should also comply with safety requirements.
The commercial grade construction actually exceeds the requirements stipulated by the MED and like all of Entel’s HT series radios, these GMDSS radios are all uniquely IP68 submersible (5 metres’ submersion for 1 hour).
Whichever GMDSS variant you choose, it comes in one of two packages. The basic Package 1 consists of the radio with primary battery only, while the more inclusive Package 2 comprises the same plus secondary battery and trickle charger. Taken together with the available variants and options outlined above, this competitively priced versatility means that whatever the requirement, Entel’s new GMDSS portables have got it covered.
These 2 way radios can come with or without a high–visibility LCD screen and uniquely – intrinsically safe variants will follow shortly (both ATEX and USTC certification is available), for those operating portable radios in hazardous environments. As it is mandatory for vessels carrying hazardous cargoes to use intrinsically safe radios, we believe that their GMDSS radios should also comply with safety requirements.
The commercial grade construction actually exceeds the requirements stipulated by the MED and like all of Entel’s HT series radios, these GMDSS radios are all uniquely IP68 submersible (5 metres’ submersion for 1 hour).
Whichever GMDSS variant you choose, it comes in one of two packages. The basic Package 1 consists of the radio with primary battery only, while the more inclusive Package 2 comprises the same plus secondary battery and trickle charger. Taken together with the available variants and options outlined above, this competitively priced versatility means that whatever the requirement, Entel’s new GMDSS portables have got it covered.
Entel & General Dynamics develop digital meshing 2 way radio
Entel is pleased to announce its involvement in digital meshing 2 way radio technology. This latest enterprise by Entel’s UK-based team is being conducted under a contract with General Dynamics for the Pathmaker™ Network. General Dynamics C4 Systems is a prime contractor and systems integrator with almost 50 years experience in delivering communications solutions for military and government deployment.
Mobile mesh network technology is the revolutionary “next step” in digital 2 way radio communications, in that it can provide a defined group of users, in mission-critical applications, the ultimate in reliable connectivity and coverage, without the need for additional infrastructure and support – including situations where conflict or natural disaster has destroyed existing infrastructure.
What is a Meshing?
1.Meshing is a method used to provide rapidly scalable 2 way radio coverage in the most arduous environments by ‘linking’ all the 2 way radios together without the need for any infrastructure (fixed base stations)
2.Each 2 way radio in a mesh network is also a repeater (relay) dynamically extending the range of the system in any direction, at any time.
3.By definition, the coverage of a mesh network is ‘self healing’
In effect, with meshing technology, each handheld transceiver is part of a mesh of high-speed data and communications. By becoming a data router-repeater in itself, incorporated into a “virtual” and dynamic infrastructure, each portable device contributes to a self-routing, ad hoc and multi-hop mobile network.
Meshing technology lends itself perfectly to tactical rescue, law enforcement and military applications, but also brings dynamic networking capabilities to challenging civilian environments, such as major civil engineering projects, campus security, on-shore and off-shore oil and gas installations, and others.
Mobile mesh network technology is the revolutionary “next step” in digital 2 way radio communications, in that it can provide a defined group of users, in mission-critical applications, the ultimate in reliable connectivity and coverage, without the need for additional infrastructure and support – including situations where conflict or natural disaster has destroyed existing infrastructure.
What is a Meshing?
1.Meshing is a method used to provide rapidly scalable 2 way radio coverage in the most arduous environments by ‘linking’ all the 2 way radios together without the need for any infrastructure (fixed base stations)
2.Each 2 way radio in a mesh network is also a repeater (relay) dynamically extending the range of the system in any direction, at any time.
3.By definition, the coverage of a mesh network is ‘self healing’
In effect, with meshing technology, each handheld transceiver is part of a mesh of high-speed data and communications. By becoming a data router-repeater in itself, incorporated into a “virtual” and dynamic infrastructure, each portable device contributes to a self-routing, ad hoc and multi-hop mobile network.
Meshing technology lends itself perfectly to tactical rescue, law enforcement and military applications, but also brings dynamic networking capabilities to challenging civilian environments, such as major civil engineering projects, campus security, on-shore and off-shore oil and gas installations, and others.
Business or consumer 2 way radio—— which is best?
We frequently get questions from business customers asking if they really need to buy a “business” 2 way radio. Business radios are generally much more expensive than consumer radios and the features are often very similar, so it is easy to see why this can be confusing. In this post I’ll try to explain the common differences between these types of radios, and hopefully provide enough information for you to decide what’s best for your business.
FCC Regulations
Whether a 2 way radio is “business” or “consumer” is decided by the frequencies that it uses to transmit and receive communications. The Federal Communications Commission (FCC) has set aside 22 UHF frequencies as general frequencies for use by consumers. These frequencies make up GMRS (the General Mobile Radio Service) and FRS (The Family Radio Service) channels that are supported by the consumer radios that we sell.
Technically, use of the GMRS channels requires an FCC license. This license is good for 5 years and covers the applicant and his/her immediate family. GMRS licenses are not issued to businesses. Here is a note from the FCC’s GMRS license application form (form 605):
Note: For GMRS: effective January 1, 1989, new or major modification applications may NOT be filed by non-individual (business) applicants/licensees.
For GMRS radios to be legally used by businesses, each person using the radios would need an individual GMRS license. A business could use the radios on an FRS channel without a license, but when using FRS channels the radio cannot transmit at more than a half watt of power. This is generally only good for a quarter to a half mile of outdoor range.
Business radios use different frequencies ranges that have been approved by the FCC for business use. These frequencies are not as popular, so you typically don’t have to worry about “chatter” on your channels. You can also get business radios that operate on VHF frequencies, which work better than UHF outdoors or inside of and around wood structures. You will pay more upfront for your business radio, but if there are several employees that will use it you will likely save money after factoring in the license cost.
Durability
Business radios are usually designed to hold up to abuse better than consumer radios. Consumer radios are usually built for infrequent use: weekend, hunting, trips, multiple car caravans, skiing, camping, amusement parks, etc. They are usually lightweight with a thin plastic casing. Business radios are designed to be used for hours every day, and they will hold up better than consumer radios. Many are built to military specifications.
Battery Life
If your business plans to use radios for more than a few hours a day, battery life is something that you will not want to overlook. Most consumer radios include rechargeable batteries that are good for 8 hours or less of use. As is typical of batteries, this life will likely diminish slightly over time. Some business or professional radios are also limited in their battery life, but others will typically 13 hours or more on a charge.
Accessories
Business radios typically have a better selection of accessories than consumer radios. If accessories, such as headsets or earpieces, are important to your business, you should look at what accessories are available before you choose a radio. Things like rapid chargers and multi unit chargers are only available for business radios.
Common Scenarios
There are some scenarios where a business radio is always your best choice. For example, anytime you expect to use the radio frequently and for more than 7 hours with each use. If you purchase a consumer radio for this, there is a good chance you will be disappointed with the battery life. Also, if you are in a “tough” work environment, such as a construction or industrial situation. Consumer radios are not designed to take this kind of beating.
It would best to choose a consumer radio in a light-duty situation where very little range is needed. This would allow you to get away with only using the FRS channels and avoiding the license fees. A great example is a school that needs radios for directing traffic in mornings and afternoons.
FCC Regulations
Whether a 2 way radio is “business” or “consumer” is decided by the frequencies that it uses to transmit and receive communications. The Federal Communications Commission (FCC) has set aside 22 UHF frequencies as general frequencies for use by consumers. These frequencies make up GMRS (the General Mobile Radio Service) and FRS (The Family Radio Service) channels that are supported by the consumer radios that we sell.
Technically, use of the GMRS channels requires an FCC license. This license is good for 5 years and covers the applicant and his/her immediate family. GMRS licenses are not issued to businesses. Here is a note from the FCC’s GMRS license application form (form 605):
Note: For GMRS: effective January 1, 1989, new or major modification applications may NOT be filed by non-individual (business) applicants/licensees.
For GMRS radios to be legally used by businesses, each person using the radios would need an individual GMRS license. A business could use the radios on an FRS channel without a license, but when using FRS channels the radio cannot transmit at more than a half watt of power. This is generally only good for a quarter to a half mile of outdoor range.
Business radios use different frequencies ranges that have been approved by the FCC for business use. These frequencies are not as popular, so you typically don’t have to worry about “chatter” on your channels. You can also get business radios that operate on VHF frequencies, which work better than UHF outdoors or inside of and around wood structures. You will pay more upfront for your business radio, but if there are several employees that will use it you will likely save money after factoring in the license cost.
Durability
Business radios are usually designed to hold up to abuse better than consumer radios. Consumer radios are usually built for infrequent use: weekend, hunting, trips, multiple car caravans, skiing, camping, amusement parks, etc. They are usually lightweight with a thin plastic casing. Business radios are designed to be used for hours every day, and they will hold up better than consumer radios. Many are built to military specifications.
Battery Life
If your business plans to use radios for more than a few hours a day, battery life is something that you will not want to overlook. Most consumer radios include rechargeable batteries that are good for 8 hours or less of use. As is typical of batteries, this life will likely diminish slightly over time. Some business or professional radios are also limited in their battery life, but others will typically 13 hours or more on a charge.
Accessories
Business radios typically have a better selection of accessories than consumer radios. If accessories, such as headsets or earpieces, are important to your business, you should look at what accessories are available before you choose a radio. Things like rapid chargers and multi unit chargers are only available for business radios.
Common Scenarios
There are some scenarios where a business radio is always your best choice. For example, anytime you expect to use the radio frequently and for more than 7 hours with each use. If you purchase a consumer radio for this, there is a good chance you will be disappointed with the battery life. Also, if you are in a “tough” work environment, such as a construction or industrial situation. Consumer radios are not designed to take this kind of beating.
It would best to choose a consumer radio in a light-duty situation where very little range is needed. This would allow you to get away with only using the FRS channels and avoiding the license fees. A great example is a school that needs radios for directing traffic in mornings and afternoons.
Difference between UHF and VHF 2 way radios
You can get a 2 way radio that use either UHF (Ultra High Frequency) or VHF (Very High Frequency). The fundamental difference is in the range of frequencies that they use. VHF radios have been around for much longer and are quite cheaper compared to UHF. Because of that, there are a lot of VHF radios in existence compared to UHF. Couple this to the fact that VHF has a much narrower spectrum and fewer channels, it leads to congestion and greater chance of having interference from other radios in the area.
The higher frequency of a UHF radio directly translates to a much shorter antenna, allowing manufacturers to produce much more compact models. This is desirable as smaller models are more portable and a lot less clumsy to manipulate. Though both types of radios can reach great distances, VHF radios suffer from signal degradation due to barriers in the landscape. These barriers can range widely from mountains, hills, trees, and even buildings. This reduces the range of VHF radios greatly, especially in urban locations. UHF waves can penetrate these barriers much better and are affected less. UHF radios often tend to consume their batteries a lot faster compared to VHF due to the higher frequency being used. This might be bad for people who are away from a charging station for extended periods of time.
Both radios are good but there are certain situations that you might find one to be better than the other. In rural areas where there are very few buildings and even fewer tall ones, you can settle for the cheaper VHF radio. The fewer number of people in the area also lessens the chance of interference since there are fewer competing users. UHF radios are the best option when you intend to use it inside city limits where you are surrounded by a lot of tall buildings and your signals are expected to pass through multiple walls. The wider frequency spectrum of UHF also lessens the chance of interference from other users, which is very likely because of the great number of people in a relatively small area.
Summary:
1.UHF radios have a wider range of usable frequencies compared to VHF.
2.VHF radio equipment is cheaper compared to UHF.
3.VHF radios need a larger antenna compared to UHF radios.
4.UHF is better at penetrating barriers compared to VHF.
5.UHF radios drain the battery faster than VHF radios.
The higher frequency of a UHF radio directly translates to a much shorter antenna, allowing manufacturers to produce much more compact models. This is desirable as smaller models are more portable and a lot less clumsy to manipulate. Though both types of radios can reach great distances, VHF radios suffer from signal degradation due to barriers in the landscape. These barriers can range widely from mountains, hills, trees, and even buildings. This reduces the range of VHF radios greatly, especially in urban locations. UHF waves can penetrate these barriers much better and are affected less. UHF radios often tend to consume their batteries a lot faster compared to VHF due to the higher frequency being used. This might be bad for people who are away from a charging station for extended periods of time.
Both radios are good but there are certain situations that you might find one to be better than the other. In rural areas where there are very few buildings and even fewer tall ones, you can settle for the cheaper VHF radio. The fewer number of people in the area also lessens the chance of interference since there are fewer competing users. UHF radios are the best option when you intend to use it inside city limits where you are surrounded by a lot of tall buildings and your signals are expected to pass through multiple walls. The wider frequency spectrum of UHF also lessens the chance of interference from other users, which is very likely because of the great number of people in a relatively small area.
Summary:
1.UHF radios have a wider range of usable frequencies compared to VHF.
2.VHF radio equipment is cheaper compared to UHF.
3.VHF radios need a larger antenna compared to UHF radios.
4.UHF is better at penetrating barriers compared to VHF.
5.UHF radios drain the battery faster than VHF radios.
How to choose the best 2 way radios for your business needs
2 way radio can add thousands of dollars to your bottom line in the first year by saving as much as 5-9% of labor time. Make absolutely sure you select the right radio for your needs the first time.
2 way radios were introduced into typical business practices decades ago. Technology and battery engineering made them cumbersome and difficult to use in everyday applications. However, 2 way radios were recently made super-affordable, more portable and were given a much improved battery life. Combine these advancements with the ability to save countless labor-hours, cost-free talk time and you have one of the most promising bottom-line tools for just about any business.
The proper 2 way radio makes all the difference in the world. For the most part, any small to upper-medium sized company can benefit from the use of today’s 2 way radio. The cost will typically range from $120 per radio to about $300 each. Improvements in battery design will get a full day use after an overnight charge for as much as 2-3 years of daily use. Plus, the durability of the radios has improved so much that it is not unheard of for some radios to still work great after 10 years.
There are four basic elements to consider in choosing the right radio for your job:
VHF vs. UHF – The difference between UHF and VHF can be explained with frequency penetration. VHF waves travel about twice the distance of UHF waves on open ground, rolling hills or through foliage. However, VHF waves are very poor at penetrating walls, buildings and rugged terrain. So, if you are working exclusively outdoors with open land, rolling hills or heavy trees, VHF radios are the best. In any other situation, including indoor to outdoor use, UHF radios will be the choice. UHF and VHF radios will not communicate with each other.
Power – If the radios will be used within a single building, or outdoors in less than about 1 mile, then a 1-watt radio will be sufficient. If the 2 way radios will be used to communicate between multiple buildings or for up to 2 miles, then a 2-watt radio should be used. There are 4 and 5 watt radios that will communicate consistently at further distances, but there is a limitation to any radio-to-radio communication. Once exceeded, the only way to proceed is through the use of a repeater.
Channels – If your entire group will always be speaking on the same channel at the same time, o matter how many radios you have, you will only need a 1-channel radio. However if you manage, say, a restaurant and you want the valets to be on one channel and the wait-staff to be on another channel, then you will want a 2-channel capable radio system. This will allow each group to communicate individually, but not talk over each other. For you, as the manager, to be able to communicate with both of the groups you will want a radio that “scans”. This will allow you to speak with either group by switching to the appropriate channel automatically.
Durability – Business radios range anywhere form units that are designed for restaurant and hotel use, to radios for heavy-duty military operations. Review the specifications on each unit to determine the best fit for your needs.
By selecting the proper elements in choosing your initial radios, you will be assured of starting off on the right foot communication-wise. You will gain all of the benefits of having two-way radio communication, but will avoid the common pitfall of having to replace old radios that will not work with what should have been used in the first place.
2 way radios were introduced into typical business practices decades ago. Technology and battery engineering made them cumbersome and difficult to use in everyday applications. However, 2 way radios were recently made super-affordable, more portable and were given a much improved battery life. Combine these advancements with the ability to save countless labor-hours, cost-free talk time and you have one of the most promising bottom-line tools for just about any business.
The proper 2 way radio makes all the difference in the world. For the most part, any small to upper-medium sized company can benefit from the use of today’s 2 way radio. The cost will typically range from $120 per radio to about $300 each. Improvements in battery design will get a full day use after an overnight charge for as much as 2-3 years of daily use. Plus, the durability of the radios has improved so much that it is not unheard of for some radios to still work great after 10 years.
There are four basic elements to consider in choosing the right radio for your job:
VHF vs. UHF – The difference between UHF and VHF can be explained with frequency penetration. VHF waves travel about twice the distance of UHF waves on open ground, rolling hills or through foliage. However, VHF waves are very poor at penetrating walls, buildings and rugged terrain. So, if you are working exclusively outdoors with open land, rolling hills or heavy trees, VHF radios are the best. In any other situation, including indoor to outdoor use, UHF radios will be the choice. UHF and VHF radios will not communicate with each other.
Power – If the radios will be used within a single building, or outdoors in less than about 1 mile, then a 1-watt radio will be sufficient. If the 2 way radios will be used to communicate between multiple buildings or for up to 2 miles, then a 2-watt radio should be used. There are 4 and 5 watt radios that will communicate consistently at further distances, but there is a limitation to any radio-to-radio communication. Once exceeded, the only way to proceed is through the use of a repeater.
Channels – If your entire group will always be speaking on the same channel at the same time, o matter how many radios you have, you will only need a 1-channel radio. However if you manage, say, a restaurant and you want the valets to be on one channel and the wait-staff to be on another channel, then you will want a 2-channel capable radio system. This will allow each group to communicate individually, but not talk over each other. For you, as the manager, to be able to communicate with both of the groups you will want a radio that “scans”. This will allow you to speak with either group by switching to the appropriate channel automatically.
Durability – Business radios range anywhere form units that are designed for restaurant and hotel use, to radios for heavy-duty military operations. Review the specifications on each unit to determine the best fit for your needs.
By selecting the proper elements in choosing your initial radios, you will be assured of starting off on the right foot communication-wise. You will gain all of the benefits of having two-way radio communication, but will avoid the common pitfall of having to replace old radios that will not work with what should have been used in the first place.
订阅：
博文 (Atom)