Features1Low battery reminder design for timely recharging. 2Made of fine quality aluminum alloy, quick heats dissipation, antidrop and wear-resistant. 3IPX4 daily waterproof, fine sealing and not easy to rust. 44 modes adjustable, you can adjust as you need. 5USB rechargeable design, you don\u0027t need to worry its battery. 6Compact size and light weight for convenient carrying, can be used as a small flashlight for household use.SpecificationThis lamp is easy to install and won't take up lots if space, bring you safety in dark environment and won't bother your Cycle. Features:Low battery reminder design for timely recharging. Made of fine quality aluminum alloy, quick heats dissipation, antidrop and wear-resistant. IPX4 daily waterproof, fine sealing and not easy to rust. USB rechargeable design, you don't need to worry its battery. 4 modes adjustable, you can adjust as you need. Compact size and light weight for convenient carrying, can be used as a small flashlight for household use. Specifications:Bracket type: type A, type B (optional) Lumen: 400lm, 600lm, 800lm (optional) Item color: black Material: aluminum alloy Waterproof: IPX4 Power: 3W for 400lm, 5W for 600lm, 7W for 800lm Battery: 400lm/600lm: 3.7V, 2000mAh 800lm: 3.7V, 2600mAh Item size: 104 * 33 * 23mm / 4.1 * 1.3 * 0.9in Item weight: 102g / 3.6ounce Package size: 163 * 100 * 52mm / 6.4 * 3.9 * 2.0in Package weight: 189g / 6.7ounce Packing List:1 * Bike Light 1 * Bracket 1 * USB CablePackage List1 * Bike Light 1 * Bracket 1 * USB Cable