Why choose the Motorcycle Flip Bluetooth Helmet?1. Certification: DOTFMVSS218/ECE 22.05 certification2. High-quality lining, sweat-absorbing, detachable, not stuffy after long-term wear.3. Polymer ABS material, anti-collision and impact resistance.4.PC sun visor, anti-fog, anti-rain, high-definition UV.5. Adhering to the principle of aerodynamics, good air permeability, gold-plated vents.Product Details:Type: flip-up helmet with bluetoothWeight: about 1650GSize: S(55~56CM), M(57~58CM), L(59~60CM), XL(61~62CM), XXL(63~64CM)Material: ABS/lining/meshHighlights: Bluetooth headphones with anti-fog blackout visor and noise-cancellingBluetooth parameters:1. Bluetooth version: V5.1+EDR2. Frequency range: 2.4026GHz-2.480GHz3. Transmission distance: more than 10M4. Microphone distance: ≤1m5. Key battery: 3.7V/500mA6. Charging time: 5 hours7. Standby time: about 120 hours8. Continuous working time: about 20 hours9. Bluetooth name: BT12Packing list:1 × Bluetooth helmet1 × Bluetooth headsetOur goal is to provide the best service and products to every customer.If for any reason you are not satisfied with our products, please contact our team immediately.