Walkie-talkies are handheld, portable radios: they communicate wirelessly using radio waves on a single, shared frequency band. Each battery-powered unit contains a transmitter/receiver and antenna for sending and receiving radio waves, a loudspeaker that often doubles up as a microphone when you talk into it, and a button that you "push-to-talk" (PTT).
A group of people who are using walkie-talkies to talk to one another have to tune in to the same frequency band, which is called a channel. Their radios are all "receiving," so their microphone/loudspeaker units are working as loudspeakers and probably hissing with static, a bit like a conventional radio that's not tuned into any particular station.
When someone wants to to talk to the others, they hold the push-to-talk button on their handset. Their radio goes quiet as their loudspeaker switches over to a microphone. As they talk into it, their words are converted into radio waves and beamed out on the prearranged channel. When the talker has finished, he or she says "over" (meaning my bit of talking is finished) and releases the push-to-talk button. The radio now switches back into listening mode and someone else can talk.
Why Walkie Talkie?
Walkie-talkies are robust, easy-to-use, and simple (with relatively few parts and features), so they're brilliant for use outdoors and great for children (or for children who need to stay in touch with parents, for example, on vacation).
Walkie-talkies generally have multiple channels (from about 8 to 25 or more) so you can easily switch to another frequency if other people are also using walkie-talkies nearby. Some walkie-talkies can also be used as baby-monitor intercoms
Where to Get?
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