Full Face Moto Motorcycle Bike Helmet Earpiece Headset Mic Microphone For Motorola Two Way Radio Walkie Talkie 2pin Full Face Moto Motorcycle Bike Helmet Earpiece Headset Mic Microphone for Motorola Radio Security Door Supervisor 2pin 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.