Features1With COB lamp beads, it is bright and eyecatching and adds more safety to night riding when night riding, 2The angle can be adjusted, the field of view is more closed, and the angle can be adjusted at 45 Degree, making night riding more fun. 3The straps of the mounting bracket can be adjusted in four gears to adjust the tightness, and the firm lining structure can buckle the strap holes. 4With IPX4 waterproof, you can ride in rainy weather (please make sure the USB capsule plug is closed). 5With its high quality material of PC and ABS, it is durable and has a long service life.SpecificationItem Type: Cycling TaillightMaterial: PC + ABSLength: Approx. 87mm/3.4inBattery: Built-In 500mAh Polymer Lithium Battery (Built-In Battery Shipped)Charging: USB ChargingLuminous Flux: 30lmLamp Beads: COB Lamp BeadsWaterproof Rating: IPX4Package List1 x Taillight1 x Mounting Bracket Strap1 x USB Charging Cable1 x Chinese and English Manual