IFeng 2 PIN D Shape Earpiece Headset Headphone for Motorola XTN446 CLS1110 SV10 MV11 CP88 Hidden PTT---Has a remote microphone with push to talk button you can clip anywhere. D Shape Earhook---By adjusting the earplug like the shape of the ear in the ear hook can be adjusted to the most comfortable orientation, snapping ears, easy to intercom. Suitable Occupation---  Relevant personnel : police, military, bouncer, and businessman  Related sites : nightclubs, bars, paintball, security, restaurants, hotels, warehouses, and noisy environments. Two-pin standard diameter ---Ear 2.5mm stereo (top pin). Mic 3.5mm stereo (bottom pin). Compatible Radio ---* CLS Series: CLS1110, CLS 1410, CLS1413, CLS1450, CLS 1450C, CLS1450CB MU Series: MU11, MU11C, MU11CV, MU12, MU12C, MU12CV, MU21C, MU21CV, MU22CVS, MU24CV, MU24CVS, MU24CVST CP Series: CP88,CP 040. CP100,CP 125, CP150,CP 200, CP250,CP 300 GP Series: GP2000,GP 2100, GP300,GP 308, GP68 ,GP 88, GP88S,GP 350 SP Series: SP10,SP21, SP50+,SP50 CT Series: CT150, CT 250, CT450, CT 450LS PRO Series: PRO1150, PRO 2150, PRO3150