What is a PTT Radio (Push-To-Talk Radio)?

A PTT-Radio offers instantaneous communication between two or more users whereby the speaker has to keep a PTT (Push-To-Talk) button depressed. It is a popular option in the communications industry because while normal two-way radio is frequency dependent, PTT-Radios make use of set-ups over the Internet and allow for coverage and connectivity in any part of the world where there is a cellular signal. A PTT-Radio requires a sim-card and is available in a range of model options to suit the needs of various companies.