Note: This earpiece is compatible with Motorola Radio ONLY, Don't work for Kenwood, Puxing, Wouxun, Baofeng.Compatible Models: XTN Serites: XTN446, XTN500, XTN600 XTN AX Series:AXV5100, AXU4100 XTN XV Series:XV1100, XV2100, XV2600, XV4100 XTN XU Series:XU1100, XU2100, XU2600, XU4100 CLS Series:CLS1413, CLS1450, CLS1450C, CLS1450CB, VL50 Spirit Series:SV10, SV11, SV11D, SV21, SV12, SV22, SV22C, SU210, SU22, SU22C, SU220 VHF / UHF Spirit, Spirit Pro, Spirit Pro+, Spirit HP 10 Spirit MU Series:MU11, MU11C, MU11CV, MU12, MU12C, MU12CV, MU21C, MU21CV, MU22CVS, MU24CV, MU24CVS, MU24CVST Spirit MV Series: MV11, MV11C, MV11CV, MV12, MV12CV, MV21C, MV21CV, MV22CV, MV24CVS CP Series: CP88, CP040. CP100, CP110, CP125, CP150, CP200, CP250, CP300 GP Series: GP2000 , GP2100, GP300, GP308, GP68, GP88, GP88S SP Series:SP10, SP21, SP50+, SP50 CT Series:CT150, CT250, CT450, CT450LS PRO Series:PRO1150, PRO2150, PRO3150 P Series:P040, P080, P1225, P1225LS DTR Series: DTR410, DTR610, DTR650 RDX Series:RDV-5100, RDV2020, RDU2020, RDU2080DD, RDU4100, RDV2080D, RDV5100 FDC:FD-150A, FD-450A, FD-160A, FD-460A Other Series: GTI, GTX, LTS2000, VL130, PMR446, ECP100, Mag One BPR400, EP450, AU1200, AV1200 Package including: 2 X Earpieces for Motorola