4-021 series :
The earphone connects to the PTT switch in which the microphone is hidden. The second wire extends from the PTT switch to the plug that connects to the two-way radio headphone jack.
Specifications:
- Two wires extend from PTT switch, one to the earphone and the other to the plug that connects to the headphone jack of two-way radio;
This earpiece can provide several plugs:
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