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As you know that on the regular accessory, the Mic audio loop is closed ONLY when the PTT is pressed, so, for VOX options, a SPECIAL accessory is required, when the Audio can reach the radio without pressing any button. Do you know what special accessory is required for the VOX option of the radio?
A:Our two-hole DMR portable radios could use the same audio accessory as MOTO’s. For VOX earpiece,you could choose those earpieces with a (PTT/VOX) switch beside the PTT Key. Please refer to the following two pictures. To invoke a VOX earpiece, you should put the switch on the VOX side(it will be equivalent you press the PTT key all the time), and then connect it with the radio, and then power on the radio. In other words, when the radio power on, if it found an earpiece inserted with external PTT pressed, it will regard the earpiece is a VOX earpiece.

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