Our helmet has excellent protection. It can provide you with the greatest degree of safety when riding outdoors, so that you can enjoy riding.We are also equipped with a professional online service team to solve the problem for you the first time, so that you have no worries ?Product details: Type: Modular Bluetooth Helmet Material: Sturdy and durable ABS shell Buffer layer: High-strength EPS buffer layer Weight: 1600g Safety certification: DOT/ECE Scope of application: Unisex Four Seasons General Recommended Uses For?for motorcycle, cruiser, touring, bicycle and scooter ?Bluetooth parameters: 1. Bluetooth version:V5.0+EDR 3. Transmission distance: 10M 4. Lithium battery:3.7V/500mA 5. Charging time:3 hours 6. Standby time:about 240 hours 7. Continuous working time:about 32 hours ?Package: Motorcycle Helmet*1 Bluetooth headset *1 Sweat-absorbent headgear*1 ?If you are satisfied with my product, I hope you can give us a comment. This is important not only to me, but also to other friends who need this product. ?If you have any questions, please contact us in time, We will solve the problem for you within 24 hours