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.
Beijing Sinoco Information Technology,Inc
Sinoco Information Technology Co.,ltd. is a high-tech enterprise committing itself to the manufacture of the VOIP terminal units
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