2.5mm 3.5mm 2 prong m1 plug, compatible with motorola 2-pin walkie talkies, models as cls/cp/xtn/axv/xv/gp/ct etc. series radios, for more detailed models, please refer to the product description. Sing-sided style, can be worn for both right and left ears. The boom microphone and headband tapes are adjustable, you can adjust it to suit for your own use. Comfortable and soft sponge-filled earmuff for sigle ear;compression-resistant design;comfortable to wear.High quality electric speaker provides clear sound. Omni-directional condenser microphone which can produce high quality sound even in loud environments. The goose neck of the mic can be adjusted at any position to make sure you get best sound tranmission. 1 wire with reinforced moisture resistant braided cable, with lapel clip. Package include: 1pack Compatible with Motorola Models: CLS Series:CLS1413, CLS1450, CLS1450C, CLS1450CB, VL50 CP Series: CP88, CP040. CP100, CP200D, CP110, CP125, CP150, CP200, CP200D, CP250, CP300 XTN Serites: XTN446, XTN500, XTN600 XTN AX Series:AXV5100, AXU4100 XTN XV Series:XV1100, XV2100, XV2600, XV4100 XTN XU Series:XU1100, XU2100, XU2600, XU4100 GP Series: GP2000 , GP2100, GP300, GP308, GP68, GP88, GP88S SP Series:SP10, SP21, SP50+, SP50 CT Series:CT150, CT250, CT450, CT450LS DTR Series: DTR410, DTR610, DTR650 RDX Series:RDV-5100, RDV2020, RDU2020, RDU2080DD, RDU4100, RDV2080D, RDV5100 Other Series: GTI, GTX, LTS2000, VL130, PMR446, ECP100, Mag One BPR400. Note: This earpiece is compatible for Motorola Radio