Duplex (telecommunications)
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A duplex communication system is a point-to-point system composed of two or more connected parties or devices that can communicate with one another in both directions. Duplex systems are employed in m
Simplex wireless communication
A simple illustration of a half-duplex communication system
Walkie-talkie
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A walkie-talkie, more formally known as a handheld transceiver or handheld radio, is a hand-held, portable, two-way radio transceiver. Its development during the Second World War has been variously cr
Duplex (telecommunications)
…parties can communicate with each other, but not simultaneously; the communication is one direction at a time. An example of a half-duplex device is a walkie-talkie, a two-way radio that has a push-to-talk button. When the local user wants to speak to the remote person, they push this button, which turns on the…
Recreational, toy and amateur radio walkie-talkies
Assorted two-way Family Radio Service (FRS) and General Mobile Radio Service (GMRS) walkie talkies with hand mic
Noemfoor, Dutch New Guinea, July 1944. A US soldier (foreground) uses a Handie-Talkie during the Battle of Noemfoor.
A modern Project 25 capable professional walkie-talkie