FEATURES: D-shaped Earhook with Boom Microphone VOX compatible for hands free operation (Radio need VOX capability) Convenient swivel clip secures the PTT to the users lapel or belt Adjusts to fit either left or right ear Lightweight and easy to use Compatible with most FRS and GMRS radios Optional remote PTT Works with: Motorola CP88, CP100, CP150, CP200, CT150, CT250, CT450, CT450LS, GP2000, GP300, GP308, GP68, GP88, GTI, GTX, LTS2000, P040, P080, P110, P1225, P1225LS, P2000, PRO3150, SP10, SP21, SP50, XTN446, XTN500, XTN600