The market positioning of wireless walkie talkies and other wireless communication tools (such as mobile phones) is different and difficult to replace each other. Radio walkie talkies are by no means outdated products, they will be used for a long time. With the development of the economy and social progress, people are more concerned about their own safety, work efficiency, and quality of life, and the demand for wireless walkie talkies will also grow day by day. The widespread use of walkie talkies by the public has further promoted their popularity and reliance as a means of communication.

Simplex communication refers to information that can only be transmitted in one direction at the same time: you say I listen, I say you listen. This type of transmitter and receiver can only work alternately, and a radio intercom that cannot work simultaneously is called a simplex. The simplex machine works by pressing the key to control the conversion between receiving and transmitting. When the transmitting Control key is pressed, the transmitting is in the working state and the receiving is not in the working state; On the contrary, when the transmit button is released, the transmit is in a non working state and the receive is in a working state. According to frequency usage, simplex machines can be divided into co frequency simplex machines (also known as single frequency machines) and cross frequency simplex machines (also known as dual frequency machines, quasi duplex machines, and half duplex machines).