USB charging lamp: USB charging front and rear lamps. 1300mAh rechargeable lithium battery is built in the headlamp and 330mah rechargeable lithium battery is built in the tail lamp.Ultra high brightness with 4 modes: the headlights and taillights are equipped with a one touch switch, which can select four different lighting modes according to your preference. Including full brightness, half brightness, fast flashing and slow flashing.Easy installation \/ quick release: the headlamp is equipped with a mounting bracket that can be easily fixed to the handle. The silicone mounting strap for the headlights and taillights is designed with four openings and fits tightly around the seat pillars of most sizes. Both headlights and taillights can be easily loosened and fastened without tools.Multi purpose: this bicycle lamp will bring you visual lights to provide additional safety and protection in bad weather. Bicycle lights can only be used as emergency flashlights, flashlights, helmet headlamps at most, for cycling, camping, walking or other night work.