abcGOODefg&reg; 2 Pin Kenwood Half/Open Face Helmet Motorcycle Earphone Headphone with Microphone Compatible with Kenwood TK3118 TK3130 TK3131 TK3160 TK3170 TK3173 ect for Biker Designed to work with moto/bike racing helmet. Noise cancelling with boom mic microphone. Dual speakers with sticker, can be pasted to inside of the helmet. PTT button with velcro which can be fixed to handlebar is convenient to use. Open/Half Face Motorcycle Bike Helmet Earpiece Headset Mic Microphone for Kenwood Wouxun Puxing Radio Security Door Supervisor 2pin