GR: MTLSPK. Light weight mini speaker mic for Motorola GP300, XTN, HT1250 series. GP & SP Models: GP68, GP88, GP88S, GP300, GP 308, GP2000, GP2100., this ear mic will also work with. Motorola VHF / UHF Spirit, Spirit Pro, Spirit Pro+ inclusive of SV10, SV11, SV11D, SV21, SV12, SV22, SV22C, SU210, SU22, SU22C, SU220, MV11, MV11CV, MV12, MV12CV, MV21C, MV21CV, MV22, MV22CV, MU11, MU11C, MU11CV, MU12, MU12C, MU12CV, MU21C, MU21CV, MU22CVS, MU24CV, MU24CVS, MU24CVST.