Compatible with Motorola XTS1500, XTS2000, XTS2250, XTS2500, XTS3000, XTS3000 Astro, XTS3500, XTS4250, XTS5000, XTS5100, XTS7700, XTS 5000R, XTX2500, GP1200, GP900, GP9000, HT1000, HT2000, JEDI, JT1000, MT1000, MT1500, MT2000, MT6000, MTS2000, MTX1000, MTX8000, MTX- ls, MTX- b5, MTX- b7, MTX838, MTX900, MTX960, MTX9000, MTX90,MTX-LS PR1500, PM1500;Johnson (EF3):51 Fire ES, 51LT ES, 51SL, 511X,512X, 514X, 515ES, 515L, 518X, 51SLES Series, 5000 Series, 5100 ES Series, 7700 Series, Ascend 5100, Ascend ES AN/PRC-127EF Series, Avenger 8100 Series, Multi-net Ascend ES Series Viking VP300, VP400, VP600, VP900, Viking Fire, Viking CK8500 Series;also fits for Kenwood Viking VP600, Viking VP900, etc.