1. Adopt Qualcomm CSR audio bluetooth chip and integrate bluetooth 5.0. 2. It adopts a buckle design that can be quickly detached. When the battery is low, it can be quickly removed from the helmet for charging, which is fast and convenient. 3. Material: ABS+silicone 4. Transmission distance: 10m 5. Working hours: about 60 hours 6. Standby time: 200 hours 7. Battery capacity: 1100mAh 8. Charging time: 2 hours 9. Charging port: Micro USB