Specification: Color:Black Material: ABS Size: width 60MM* length 120MM Chuck range: 50-80MM (4-6.3 inch mobile phone) Charging type: USB charging Charging time: 5 hours Battery capacity: 4000mAh Output voltage / current: 0.8A Headlight brightness: 40000LM Lamp type: LED lamp beads *3 Speaker decibel: 130 decibels Sound mode: 5 sound modes Mobile phone size requirements: 4-6.3 inch mobile phone Packing List: 1x bike headlight 【USB Rechargeable＆Power Bank】Built-in High-capacity 4000mAh rechargeable batteries. It only takes 2 hours to fully charge with an extra-long run time. USB bike light can also charge your mobile phone or provide lighting, Even if you are outdoors, you no longer have to worry about your phone running out of power or being dark. 【USB Rechargeable＆Power Bank】Built-in High-capacity 4000mAh rechargeable batteries. It only takes 2 hours to fully charge with an extra-long run time. USB bike light can also charge your mobile phone or provide lighting, Even if you are outdoors, you no longer have to worry about your phone running out of power or being dark. 【3 LED Beads & 3 Modes】The Bike Headlight is equipped with 3 professional LED lamp beads adopt German advanced technology produces ultra bright light which making your bike stand out. Features 3 lighting modes (High,Low,Flash) for choosing according to your needs. Enhance the safety during night riding. 【3 LED Beads & 3 Modes】The Bike Headlight is equipped with 3 professional LED lamp beads adopt German advanced technology produces ultra bright light which making your bike stand out. Features 3 lighting modes (High,Low,Flash) for choosing according to your needs. Enhance the safety during night riding. 【Waterproof-Rainproof-Anti-Snow】Made of premium material, it has excellent impact resistance, heat dissipation and corrosion resistance. Waterproof bike headlight against splashing water from any angle.