Universal for winter and summer helmets, built-in helmet Bluetooth headset Six major advantages: Bluetooth 5.3, long-lasting battery life, call broadcast, -to-two, compact and , voice assistant 16H long-lasting battery life, carefully high-voltage chips, fast charging One-click wake-up of Al voice assistant, double-click "-" to wake up assistant, avoid manual operation during riding, and escort your safety Incoming calls are answered automatically. The incoming call is automatically answered after the phone number is broadcast, which is during riding Bluetooth chip 5.3. Using the current advanced Bluetooth 5.3 technology, it has lower power consumption, stable connection, low latency, and more stable signal You can connect two mobile phones at the same time, and freely choose one device to switch to listen to music, navigation, and answer calls Not in-ear wear, . Non-in-ear, you can notice the horn of the behind you while riding and talking to avoid danger Small and with a large volume. 12mm ultra-thin body, matching most helmets on the market, and beautiful to wear, with a large volume and clear sound quality Color: Black Material: ABS Package Contents: 1 * Helmet Headsets Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.