This lamp is easy to install and won't take up much space, bring you safety in dark environment and won't bother your cycling. Features: High brightness big LED lamp bead, long service time. Cut-OFF line light, won't hurt eyes and safer. Built-in fine quality large capacity battery, USB recharging design, you don't need to worry its battery. IPX67 waterproof level and can adapt to various complex outdoor environments. Easy to install and disassemble. Battery indicator reminds you to recharge in time. Five modes can be adjusted. Can be used with a code watch, suitable for a variety of code watch base. Light weight and mini size, easy for carrying. Gear memory function, automatically selects the shutdown gear when starting. Specifications: Color: black Material: aluminum alloy+PC Lumen: 800 Waterproof: IPX67 Battery: 3.7V, 3000mAh Control cable length: 0.6m Recharging time: 2h Light angle: 85 Item size: 70 * 44 * 42mm / 2.8 * 1.7 * 1.7in Item weight: 143g / 5.0ounce Package size: 130 * 78 * 57mm / 5.1 * 3.1 * 2.2in Package weight: 287g / 10.1ounce Packing List: 1 * Bicycle Light 1 * Bracket 1 * Control Cable 1 * Wrench 1 * Data Cable 1 * Screw 1 * Buckle