Multi-Pin Motorola Adapter (Version 2) is compatible with 3.5mm Throat Mic.
Compatible with:
GP900, GP9000
HT1000
JT1000
MT2000, MTS2000, MT6000, MTX838, MTX900, MTX1000, MTX8000, MTX9000, MTX-LS
XTS2000, XTS2500, XTS3000, XTS3500, XTS5000/ 5100/ 7700