Features1Four modes can be switched with one button, making it easy to use and simple to operate. 2USB rechargeable design, with large capacity battery for long working time. 3Compact size and light weight, Cycle without burden. 4Easy and quick to install and remove, not only it can be a bike light, but also it can be a flashlight. 5High power light with long range, safer night Cycle. 6With battery indicator function, the button will turn red when the battery is low, for timely recharging. 7IPX4 waterproof, rainproof in dailylife, don\u0027t worry about sudden drizzle. 8l2wt-NaNSpecificationThis lamp is easy to install and won't take up much space, bring you safety in dark environment and won't bother your Cycle. Features:Four modes can be switched with one button, making it easy to use and simple to operate. USB rechargeable design, with large capacity battery for long working time. Compact size and light weight, Cycle without burden. Easy and quick to install and remove, not only it can be a bike light, but also it can be a flashlight. High power light with long range, safer night Cycle. With battery indicator function, the button will turn red when the battery is low, for timely recharging. IPX4 waterproof, rainproof in dailylife, don't worry about sudden drizzle. Specifications:Item color: black, yellow, blue (optional) Lumen: 400lm Material: plastics Battery: 3.7V, 1500mAh Item size: 100 * 35 * 25mm / 3.9 * 1.4 * 1.0in Item weight: 73g / 2.6ounce Package size: 145 * 93 * 47mm / 5.7 * 3.7 * 1.9in Package weight: 136g / 4.8ounce Packing List:1 * Bicycle Light 1 * Bracket 1 * USB CablePackage List1 * Bicycle Light 1 * Bracket 1 * USB Cable