【900mAh Large Capacity Battery & IP67 Waterproof】 The X1 helmet headset is equipped with an 800mAh battery life. With a full charge of just 2 hours, you can enjoy up to 60 hours of music playback/call experience and 360 hours of standby time in all weather conditions. In addition, the X1 helmet headset adopts an IP67 class full waterproof design, and each component is carefully sealed, effectively preventing water ingress during riding, allowing you to focus on the enjoyment of the ride. Operating frequency band: 2402MHz—2480MHz 【Bluetooth V5.3 Chip and Simultaneous Connection of 2 Smartphones】 The X1 motorcycle helmet, compatible with Bluetooth V5.3, offers faster data transfer, lower latency, and a wider transmission range, allowing you to easily enjoy music and calls. It also supports simultaneous connection of two smartphones, and pairing is not required. It is convenient for people who have two mobile phones to switch between them when connected. 【Strong Helmet Compatibility】 The X1 helmet earphones come with two types of microphones: a bendable microphone and a hose microphone. They are equipped with a metal base and 3M tape. Therefore, they are compatible with jet helmets, full-face helmets, half-shell helmets, and various types of helmets.