So, what is VOX on a walkie talkie? VOX, also known as “voice-activated transmission” or “voice-operated exchange,” is a switch that begins transmitting when you start talking, making it hands-free. Unlike the PTT, the VOX microphone is ready to transmit whenever it detects noise over a certain frequency threshold and stops when you finish talking.
press side 1 key and power on the radio,turn on the vox function
turn off the radio
and press the side 2 key and power off the radio, turn off the radio.