Description: - USB rechargeable light, built in 650mAh rechargeable lithium battery for each light. No battery replacement. - The Headlight and Taillight feature 4 modes: full brightness, half brightness, fast flashing and slow flashing, switches it as you need - Advanced silicone mounting strap. The strap is elastic enough to fit all kinds of bikes and can be mounted on any part of the bike - Easy installation. The strap can be easily loosen and fasten, and no tools are required. - Get riding safely. Guide the way with the headlight and need not worry about being knocked over by others with the taillight. Specifications: * Item Name: Bicycle COB warning light *Shape: Irregular *Color: Red, white *Material: Aluminium alloy, Plastic *Size: About 4.5 * 4.5 cm/ 1.77 * 1.77 inch(L*W) *Waterproof: IPX4 *Battery: 650mAh rechargeable lithium battery *Discharge Time of Full charge: *Head Light: 3.5hr (full brightness) ,10hrs (half brightness), 10.5hrs (slow flashing), 10hrs (fast flashing) *Tail Light: 2.5hr (full brightness) ,9hrs (half brightness), 9.5hrs (slow flashing), 9hrs (fast flashing) *Quantity: 2Pcs/set pack: 2pcs-Red and White light Packing list Package Included: 1 x USB charging front light 1 x tail light