Yi spirit technology
Wireless walkie-talkie and mobile phone are both a wireless communication tool, but compared with mobile phone, wireless walkie-talkie can not only one-to-one real-time communication, but also one-to-many, and it does not need to pay for calls. In the past, wireless walkie-talkies were mostly used in public security, military, medical and other public utilities. Later, hotels, security, construction sites and other commercial occasions began to introduce walkie-talkies as main communication tools.
Now, ordinary users are also buying wireless walkie-talkies for self-drive Tours, hiking, mountaineering and other recreational activities. Use the occasion of much, radio became more and more, the kinds of overall total can be classified the following eight categories: 1, professional wireless intercom professional wireless interphone usually refers to the transmission power for 4 to 5 w, frequency range in 136-174 MHZ or 400-480 MHZ wireless interphone, the biggest characteristic of this kind of radio is distance calls, under the condition of the environmental impact can reach 3-8 km. Professional walkie-talkie is generally used in construction sites, property management, factory workshops and other occasions, the operation is relatively simple, no digital keys, only two knobs, used to control the number of channels, power and volume. Recommended model: MOTOROLA P8608i 2. Commercial wireless walkie-talkie refers to a wireless walkie-talkie with transmitting power of 0.5-4w and frequency range of 400-800mhz, and the talking distance is between 800 meters and 8 kilometers. Compared with professional walkie-talkies, commercial walkie-talkies are lightweight and can be connected to earphones. They are mostly used in restaurants, shopping malls and other places. Recommended model: MOTOROLA C1200 3, civil wireless walkie-talkie refers to a wireless walkie-talkie with transmitting power of 0.5-1w and frequency range of 409MHz. This type of walkie-talkie is short distance, small size, and much cheaper than professional and commercial walkie-talkie, suitable for individual users. Amateur wireless walkie-talkie refers to the wireless walkie-talkie with the frequency range of 144-146mhz and 430-440mhz. It is designed for amateur radio enthusiasts. It is small in size and easy to operate. Recommended model: MOTOROLA P3688 5, explosion-proof wireless intercom production of explosion-proof wireless interphone brand is very few, the domestic market can find only MOTO, witex, easy easy these three brands. The so-called explosion-proof means that the walkie-talkie can be used in inflammable and explosive environments, such as coal mines, gas companies, gas stations and other places. Railway wireless walkie-talkie refers to the wireless walkie-talkie designed for the work needs of railway departments, with the transmitting power of 4-5w and the frequency range of 440-470mhz. Due to the high noise of train running, the audio output of railway radio talkie is very demanding, which can make the call sound quality clearer through voice compression and expansion. Recommended model: MOTOROLA GP338D 7, police wireless intercom police wireless intercom is a special equipment for the public security system, the frequency range is 350-370 MHZ or 370MHz, no one should steal and steal in any way. Therefore, when choosing a walkie-talkie, users should pay attention to the transmission frequency range of the walkie-talkie at 400-420mhz or 450-470mhz to avoid unnecessary troubles. Recommended model: MOTOROLA E8668I 8, on-board wireless intercom the working voltage of the on-board wireless interphone is 12.5v, the voltage of the car is generally 12V or 24V, so when the on-board wireless interphone to work in the voltage of 24V car, it is necessary to install a transformer between the car and the wireless interphone. The transmitting power of on-board wireless walkie-talkies is large, generally ranging from 25 to 50W. The signal transmitting is far away, but it cannot be moved at will, so it can only be fixed on the vehicle for use. Recommended model: MOTOROLA XiR M6660