11/05/2018

Walkie-Talkie






walkie-talkie is a hand-held, portable, two-way radio transceiver.walkie-talkies spread to public safety and eventually commercial and jobsite workTypical walkie-talkies resemble a telephone handset, with a speaker built into one end and a microphone in the other (in some devices the speaker also is used as the microphone) and an antenna mounted on the top of the unit. A walkie-talkie is a half-duplex communication device. Multiple walkie-talkies use a single radio channel, and only one radio on the channel can transmit at a time, although any number can listen. The transceiver is normally in receive mode; when the user wants to talk he presses a "push-to-talk" (PTT) button that turns off the receiver and turns on the transmitter. Walkie Talkies use a radio frequency, normally around 466 MHz, to allow basic chat over short and medium distances. Because of this PMRs (private mobile radio) have quite a lot of uses including:
·          Lifeguards
·          Police Service
·         Shopping centre security
·         Shop / Warehouse staff
·         Skiing trips
·         Hiking
Why do I need a Walkie Talkie?
A Walkie talkie can provide you  with a way of contacting someone in an emergency, especially when a mobile signal isn’t achievable. With a range being between 6km and 12km on a basic Walkie Talkie, allows you to work over large distances without having to worry about connection loss.

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