USB QUICK CHARGINGThe bicycle light kit front and rear lights have built-in 540mAh rechargeable lithium batteries. Full charge only takes one hour. You never have to worry about buying or replacing batteries. Simply connect to a computer or other USB power port for fast charging. 6 LIGHTING MODES There are 6 lighting modes for headlights and taillights: high brightness , medium brightness, low brightness, light flashing, fast flashing, warning flashing, just press the switch to switch to light mode, easy to operate IPX4 WATERPROOF STANDARD The port of USB charging is made of IPX4 waterproof material and silicone material, which ensures that the inside of the bike light will not be corroded by rain. It has strong waterproof ability and effectively prolongs the life of bicycle lights is improved. ROBOUS AND EXQUISITE The shell is made of PC plastic, which is solid and durable. The size of the white headlight and the red taillight is 33*25MM, and the weight is 20g, which is lighter than other car lights. You can install it on any part of the bike, don't worry about it being damaged EASY TO INSTALL AND REMOVEThe package comes with 4 silicone mounting straps, enough flexible to fit bikes of all sizes. The silicone belt can be easily detached and attached without any tools, and it is very easy to install and remove. Ideal for use as road bike lights, mountain bike lights and children's bike lights.