IFeng Shoulder Speaker Mic Microphone for Motorola Handheld Radio GP88 GP300 GP2000 P040 PRO1150 CLS1110 XTN500 C506 Two-pin standard diameter: Ear 2.5mm stereo (top pin). Mic 3.5mm stereo (bottom pin). Hands free compatible with radios that are hands free capable. Has a remote microphone with push to talk button you can clip anywhere. Applications: l Relevant personnel: police, military, bouncer, and businessman. l Related sites: nightclubs, bars, paintball, security, restaurants, hotels, warehouses, and noisy environments. Compatible with :*XTN Series: XTN446, XTN500, XTN600 XTN XV Series: XV1100, XV2100, XV2600, XV4100 XTN XU Series: XU1100, XU2100, XU2600, XU4100 XTN AX Series: AXV5100, AXU4100 CLS Series: CLS1110, CLS1410, CLS1413, CLS1450, CLS1450C, CLS1450CB, VL50 *CP Series: CP88, CP040. CP100, CP110, CP125, CP150, CP200, CP250, CP300 *GP Series: GP2000 , GP2100, GP300, GP308, GP68, GP88, GP88S *Other Series: GTI, GTX, LTS2000, VL130, PMR446, ECP100, PR400, Mag One BPR400, EP450, AU1200, AV1200