Hytera PD505 and PD405 Pin Wiring Data
2.5mm Pin (11.6mm long)
(NB this is not the same a used in Motorola earpieces. Motorola earpieces give an unreliable connection).
Ground for Mic only (not for speaker)
Mic in Series with PTT switch.
3.5mm Pin (14.3mm long)
Speaker Output +ve
Speaker Output -Ve
Hytera PD505 and PD405 pinout
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