For Motorola 2 pin -Type plug 2-Pin Covert Acoustic Air Tube Earpiece:

Compatible Models :

CP Series:CP88, CP040. CP100, CP110, CP125, CP150, CP185,CP200, CP250, CP300,cp200d,

XiR P3688, DP1400, DEP450, EP350 MX

GP Series: GP2000 , GP2100, GP300, GP308, GP68, GP88, GP88S,GP3688,GP3188,GP2000S,GP68

RDX Series:RDV-5100, RDV2020, RDU2020, RDU2080D, RDU4100, RDU4160D, RDV2080D, RDV5100 CLS Series:  CLS446,CLS1110, CLS1410, CLS1413, CLS1450, CLS1450C, CLS1453CH 

Other Series: Mag One,GTI, GTX, LTS2000, VL130, PMR446, ECP100,BPR400, EP450, AU1200, AV1200

XTN Series: XTN446, XTN500, XTN600 XTN

AX Series: AXV5100, AXU4100

XTN XV Series:XV1100, XV2100, XV2600, XV4100,

XTN XU Series: XU1100, XU2100, XU2600, XU4100

for Motorola Spirit Series: SV10, SV11, SV11D, SV21, SV12, SV22, SV22C, SU210, SU22, SU22C, SU220

Spirit MU Series: MU11,MU11CV,, MU12CV, MU21CV, MU22CVS, MU24CVS, MU24CVST

Spirit MV Series: MV11, MV11CV, MV12CV, MV22CV, MV24CVS

SP Series: SP10, SP21, SP50+, SP50

RM Series: RMU2040, RMU2043, RMM2050, RMU2080, RMU2080D, RMV2080, RVA50

CT Series: CT150, CT250, CT450, CT450LS PRO Series: PRO1150, PRO2150, PR

DTR Series: DTR410, DTR450, DTR510, DTR550, DTR610, DTR650, DTR2430, DTR2450

  Other models: AP10, AP50, AP73, AU1200, AV1200, BPR-40, BPR40 MagOne, ECP100, EP450,

HYT(Hytera) 2-pin Models: TC-300, TC-446S, TC-500, TC-508, TC-518, TC-580, TC-600, TC-610,TC-618,TC-620, TC-700, TC-700EX, TC-700ExPLUS, TC-850, TC-900, TC-1600,TC-2100, TC-2100H, TC-2110, TC-2100,PD-502,PD-562