The headlight can be easily mounted onto the bike with the included bracket. The headlight has five lighting modes. The convenient and versatile design makes you more convenient and safe during cycing. XL-400 bicycle headlight adopts micro-usb charging interface, no need to replace the battery, it can be charged repeatedly, which is more convenient and faster. Equipped with a 2200mAh high-capacity battery,it can ensure that you ride more safely at night. Adopts USB charging mode, It can be used as a mobile power supply. When you need to charge outdoors, this lamp can be used for emergency charging. This bicycle headlight has stability, safety and waterproof characteristics. Make your riding and journey safer and more comfortable. size:9.4cm Material: Plastic+aluminum colour: black Package Contents: 1 x Headlight 1 x USB charging cable 1 x GoPro Adaptor 1 x GoPro Adaptor bolt 1 x Handlebar mount 1 x English manual 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.