This product is a bicycle tail lamp, which is easy to install, with striking red light, and is safer to ride at night. Features: Waterproof design, not afraid of rainy days. USB quick rechargeable design, you don't need to worry its battery. Wide-angle design, wider light range, safer riding at night. Compact size and light weight, easy for carrying and storage. High brightness LED lamp beads are used, with low power consumption and longer service time. Made of fine quality ABS material, wear-resistant and antifall, long working time. Various installation methods, can be installed on the front, rear or seats poles of the bike as required, making disassembly and assembly convenient and quick. Specifications: Type: type A, type B (optional) Light mode: Type A: flashing red and white light, flashing white light, flashing red light, red light, white light (5 modes adjustable) Type B: flashing red light, strong red light, weak red light (3 modes adjustable) Lumen: 300lm Battery: 3.7V, 300mAh Material: ABS Item size: 50 * 39 * 28mm / 2.0 * 1.6 * 1.1in Item weight: 25g / 0.9ounce Package size: 82 * 68 * 32mm / 3.2 * 2.7 * 1.3in Package weight: 55g / 1.9ounce Packing List: 1 * Bike Tail Light 1 * Bracket 1 * Rubber Fixture Band 1 * USB Cable