400 lumens lasting 8 hours battery life meet the need of riding all night, with USB fast charging 3 hours can illuminate 2-8 hours, super power saving design. Small size, easy to carry, range 200 M, mini style, no burden, making your cycling experience more relaxed. Easy to install and remove , non-slip. IPX3 waterproof, but Do Not soak it into water. 360 rotation to adjust LED light 39;s direction as you want. Quick release design, easy to install on and off, very convenient. Double-port holder at any time can be rotated, can be installed on the handlebar, seatpost or rear fork. Clamp range: Rubber washers to adjust diameter from 18mm to 38mm, Universal for most handlebar. Specification: Bike Light: Material: Aluminum Alloy Size: 100x33.8x22.8mm Mode: 4 Modes High Bright / Middle Bright / Low Bright / Flash Waterproof: IPX3 Lumen: 400Lumen Range: 200M Charging Time: About 3 h Surface craft: Abrasion resistant anodizing Flashlight Holder: Material: Plastic and Resin Size(LxWxH): approx. 10x5.6x3.2cm/ 3.93x2.2x1.26inch Package Includes: 1 Piece Bike Light with 1 Piece USB Cable 1 Piece Flashlight Holder with 4 Pieces of Washers Note: If you do not use it for a long time, please charge it every three months. Do not shine into the eyes. Keep away from flammable and explosive materials. Waterproof grade is IPX3. Do not immerse the bicycle light in water. Place the bicycle lights correctly. Keep out of reach of children to avoid accidents.