A walkie-talkie is a half-duplex communication device; multiple walkie-talkies use a single radio channel, and only one walkie-talkie on the channel can transmit at a time, although any number can listen. The transceiver is normally in receive mode and when the user wants to talk he presses a “push-to-talk” (PTT) button that turns off the receiver and turns on the transmitter.

A Walkie talkie is not only for security purposes, event organizers, restaurants, construction sites and more industries are also using it for more efficient communication.