According to the motorcycle helmet full helmet internal structure carefully designed, using the latest Bluetooth 5.0 technology, excellent signal transmission, ultra-low power consumption of all Bluetooth devices Support auto answer function, no more manual answering of incoming calls, safe and fast It supports songs up and down, volume up and down, playback pause, automatic callback and other functions, simple operation and easy to use. Built-in 500mAH Li-ion rechargeable battery, the device has long standby and working time Support hands-free calling, truly free your hands and ensure your safety while driving.