This is a way of communicating on the half-duplex communication line, includes receiving and transmitting devices (walkie-talkie) by the way of pressing the button for switching to the voice mode or transition to the listening mode. It works as a radio speaker; one can talk by pressing the button and can listen to a voice message by releasing the button.
Mabrook Voip is a company established in 2009 with 1 customer for a month and now holding hands together with 300 partners from different part of the World.