1Multifunction: Supports all cell phones with Bluetooth, hands free calling, automatic answering of incoming calls, call rejection, call redial, improving the safety of riding and more convenient operation. 2Long Standby: Bluetooth headset comes with 800mAh rechargeable lithium ion battery, working time up to 30 hours, standby time up to 280 hours. 3IP67 Waterproof: Tightly constructed, safely waterproof, the Bluetooth motorcycle helmet headset is safe to use even in rain and snow. 4Large Buttons: Compatible with most helmets, large button design, even wearing gloves is easy to operate, very convenient to drive motorcycles, cycling, skiing, snowboarding, etc. 5Easy To Install: Headset host is designed with a separable structure, insert the back clip in the direction of the arrow, can be installed in place.