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: The large floodlight illuminates the road surface with a wide range of vision, and the main light is bright and long range, making it easier to detect road debris and gravel in advance. Cutoff line design does not dazzle pedestrians' eyes. After turning on the light sensing mode, the light automatically adjust the light brightness according to the ambient brightness. Quick release and installation, the rubber belt is fixed without tools, and the buckle bracket is easy to remove. 150m long range lightshot, warns oncoming car earlier, safer night riding. High light transmittance Acrylic lens, light weight, strong impact resistant, clear and soft light, internal reflection mirror, uniform light distribution. Four modes applicable to different scenarios. USB rechargeable design, you don't need to worry its battery. Made of fine quality aluminum alloy, resistant to falling, practical and with long lifespan. Compact size and light weight for convenient carrying, can be used as a small flashlight for household use. Daily waterproof, fine sealing and not easy to rust. Design of battery indicator light to remind you to recharge in a timely manner. Install red warning side lights on both sides of the bike light to enhance nighttime riding safety. Specifications: Color: black, silver, red, blue (optional) Working time: 6-7h Lumen: 250lm Material: aluminum alloy+acrylic Battery: 3.7V, 1800mAh Item size: 100 * 30 * 25mm / 3.9 * 1.2 * 1.0in Item weight: 105g / 3.7ounce Package size: 132 * 100 * 37mm / 5.2 * 3.9 * 1.5in Package weight: 167g / 5.9ounce Packing List: 1 * Bike Light 1 * USB Cable