3.5mm Plug Open Helmet Half Face Motorcycle Bike Helmet Headset Earpiece Microphone for iPhone 5 4S 4G 3GS 3G Samsung Galaxy Note 2 II S4 SIV S3 SIII S2 SII N7100 i9500 i9300 etc Specifically designed for you to keep away from phone radiation. 3.5mm Plug Open/Half Face Motorcycle Bike Helmet Earpiece Headset Mic Microphone For For iPhone Samsung HTC etc. 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.