This super bright bike tail light will increase your visibility to the vehicles surround you in the dark ,visible to ensure maximum safety compatible with you.IPX2 waterproof bike tail light against splashing water from any angle.Built-in rechargeable battery, all you need is a USB cord (included) to recharge it at any USB port.Small and light, easy to carryUnique shape, distinctiveLong battery life, waterproof and durableProduct Name: Bicycle Tail Light LED: COB LEDBattery: Rechargeable polymer lithium batteryBrightness; 10 lumensUse time: 5 hours of strong light, 32 hours of warning light flashingEasy to install, suitable compatible with many sizes of handlebars or seatposttype:Piscestype: IColour:blackMaterial:PC engineering plasticsSize:59.5 x 28.5 x 28.5mmPackage Contents:1 x tail light1 x Tie1 x USB cableOnly the above package content, other products are not included.Note: Light shooting 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.