Smart electronic products such as mobile phones have entered thousands of families, communication has become more and more convenient and efficient, and walkie-talkies seem to gradually withdraw from the public's field of vision. However, is the walkie-talkie really outdated? In fact, it is not. In many important fields, walkie-talkies with special advantages still play an important role.

The English name of the walkie-talkie is two-way radio, which is a two-way mobile communication tool, which is mainly composed of four parts: transmitting part, receiving part, modulation signal and modulation circuit part (that is, human voice is converted into audio signal through microphone ) And signaling processing part. When using the walkie-talkie, tune to the agreed specific frequency band, press the button, you can send your own voice, release the button, you can listen to other people’s voice

The most prominent feature of the walkie-talkie is the use of a specific frequency band for communication, which is not restricted by the network. The walkie-talkie can show its skills in places where the network is not covered, allowing users to communicate easily. At the same time, the walkie-talkie provides one-to-one and one-to-many calls. It is simple and straightforward to operate, especially in the case of emergency dispatch and collective cooperation. These features are very important. So at present, walkie-talkies are mainly used in public security, civil aviation, transportation, water conservancy, railway, manufacturing, construction, and service industries. They are mostly used for liaison and command and dispatch between group members to improve communication efficiency and rapid response ability to deal with emergencies. In addition, using the walkie-talkie has no call charges, and the call cost is low.