COB LED Bicycle Bike Cycling Rear Tail Light USB Rechargeable 4 ModesFeatures:100% Brand New and High Quality High brightness light to warn on the road.Nice texture, fashion and skidproof, looks very nice.Quick and easy installation or realse with soft and elastic strap.Water resistant.USB charging design, Technology and Convenient. Rechargeable lithium polymer battery included.Low battery, charging and fully charged indicator.Automatic fully charged cut-off system.Side visibility.Great for outdoor cycling.Specification:Material: PlasticColor: BlackLight Color: red 4 Modes:Slowly Flash/Fast Flash/SOS/ Steady LightLight Mode: Single color changePower: built-in 3.7V 500mAH lithiumHandlebar Installtion diameter: approx. 22-31.8mmQuantity: 1 pcNote: Do not charge over 5V the battery will result in damage. Package Included:1 X Bicycle Light1 X USB Charging Line 2* Silicone Brand