Features: 1. Stable Connection: Bluetooth-compatible 5.0 helmet headset, transmission distance 20-30 meters, strong and stable connection, will automatically connect back the second time it is turned on, avoiding manual operation. 2. Super Long Battery Life: Built-in 450mAh battery, can keep 360 hours standby and 18 hours work after fully charged. 3. Support FM: Support full range of FM channels, the range can reach 76.2-108mhz, as long as you are in an open place, you can receive the most local radio channels. 4. Call Function: Support call hands-free function, when the call comes in, it will automatically answer the call within 10 seconds, at the same time, it can also reject or hang up the call, support connecting intercom. 5. Waterproof Design: IP67 waterproof headset, you can safely go out riding in the rain and snow. 6.After-sale Service: If you have any questions, please contact us immediately and we will help you solve it as soon as possible. Specifications: Bluetooth-compatible Version: 5.0 Frequency Range: 2.402GHZ-2.480GHZ Bluetooth-compatible Distance: 10m Battery Capacity: 450mAh/3.7v Charging Voltage: 5V Charging Time: Approx. 2 hours Standby Time: Approx. 360h