_x005F_x000D__x005F_x000D_This item is a rechargeable LED light. Built-in Lithium battery with 4 different light modes. And with waterproof design, make you riding freely regardless of rain. Can be easily installed on the bike tail to bring some enjoyment to your drive and increase the driving safety._x005F_x000D__x005F_x000D_Features_x005F_x000D__x005F_x000D_- LED color: Red_x005F_x000D_- Mode: 4 modes. (constant,slow flash,explosion lash and flash in order)_x005F_x000D_- Brightness: 15 lumens_x005F_x000D_- Product Dimension:7.5* 3* 2cm_x005F_x000D_- Mounting Placement: seat post_x005F_x000D_- Suitable Tube Diameter:12-34mm_x005F_x000D_- internal lithium battery,only need about 2 hours to be fully charged while be used for about 12 hours._x005F_x000D_- USB rechargeable taillight and auto cut off when fully charged._x005F_x000D_- Super waterproof,make you riding freely regardless of rain.Packing list: 1 * Light_x005F_x000D_1 * USB Cable_x005F_x000D_1 * Rubber Strap