Eight types of two way radio function and scope of use

1, professional radio

Professional radio refers to the transmission power of 4-5W, frequency range of 136-174MHZ or 400-480MHZ. For this kind of walkie talkie,the talk distance is between 3 to 8 kilometers (depending on the specific environment). The operation is relatively simple because most professional walkie-talkies do not have a numeric keypad, only two knobs to control the number of channels and power and volume switches. The shortcoming of the professional radio is that the volume is larger and relatively heavy, but it is more prominent in the waterproof, anti-quake, anti-fall, anti-aging, and the performance of the walkie-talkie is much more stable. The price of the professional radio is higher, and it is generally used in construction engineering, property management, and factory workshops

2, commercial radio

Commercial radio refers to the transmitter power of 0.5-4W, frequency range of 400-480MH, this kind of transmitter talking distance between 800 meters to 8 kilometers (depending on the transmitter power size and the specific environment varies). Commercial radio appearance is light and beautiful, through the belt clip of the matching machine will be tied to the waist, wearing headphones can free hands to improve work efficiency. The price of commercial radio is relatively high as that of professional matching machine, which is generally used in shopping malls, supermarkets, retail, factories and manufacturing industries.

3, walkie talkie

Civil walkie-talkie refers to the transmission power of 0.5W is not greater than 1W, the frequency range between 409MHz walkie-talkie, civil to the general talk distance is short, (3 kilometers in the open) is approved by the state without a license can be used wireless communication equipment. The civilian walkie ralkie is small in size, diverse in color and low in price, which is more suitable for personal business trips, tourism and restaurant use.

4, amateur radio

Amateur radio designed to meet the use of amateur radio enthusiasts, the production of radio access machine. In response to this amateur radio for everyone service, each country has opened up a special frequency band allocated to amateur radio sports enthusiasts. So many countries opened up the frequency band of 144~146MHZ and 430~440MHZ, the world is generally also this frequency band, amateurs only need to buy their favorite models, apply for a local radio network permit, you can talk to others. Countries around the world generally use this frequency band.

5, explosion-proof radio

In many wireless radio brands with explosion-proof walkie-talkie brands are not many, mainly used in coal mines, liquefied gas filling companies, oil depots, oil fields, petroleum, gas stations chemical, petrochemical, coal, mining, natural gas, chemical plants, flour processing plants, flax processing plants, coal processing plants, fire.

6. Railway radio

There is no doubt that the railway railway radio is the special equipment customized by manufacturer according to the actual work needs of the railway and railway departments. The transmission power is 4-5W, the frequency range is 440-470mhz, and the front of the shell of the railway radios generally have 2-4 function buttons, which are used for the selection of communication in different environments of the plain and tunnel, and the switch between the station and the locomotive. Due to the noise of the train, the audio output of the walkie-talkie is very picky, and the walkie-talkie is compressed through the voice, making the sound quality of the call more clear and crisp.

7. Police radio

Police radio is a special equipment for the public security system, the frequency range of the police access machine is 350-370MHZ, 370-390MHZ, no one may steal the frequency resources of the public security system dedicated to the access machine in any way. The functions of the police are more, and the general appearance is mostly in the keyboard type. We should pay attention to the radio transmission frequency range is mostly (400-420MHz, 450-470MHz) to avoid unnecessary trouble

8, Mobile radio

The working voltage of the mobile radio is 12.5V, the current car voltage is divided into 12V and 24V, when the mobile radio to work on the car with a voltage of 24V, it is necessary to install a transformer between the car and the mobile radio. The transmission power of the vehicle is 25-50W, the power is large, and the signal transmission is far. The car can only be fixed in one place, and it is not as convenient to use as a hand-held radio. Mobile radio are generally used in the fleet.