feature: This is an ultra-high-brightness LED bicycle headlight that can reach up to 10,000 lumens. It is waterproof, but don't put it directly into the water. It is sturdy and durable. There are 4 modes: high, medium, low, and fast strobe. Can be used as a headlight or bicycle light. Suitable for outdoor activities such as camping, fishing, hiking, reading maps, night fishing, night flying, sailing, caving and Hunting. Specification: Number of LEDs: 3 Light color: white Lifespan: 100,000 hours Brightness: 8500 lumens Beam range: 250 meters Switch type: reverse click Reflector: Aluminum smooth Switch mode: high/medium/low/fast strobe Flashlight installation: handle Material: aluminum alloy Colour: Black Power supply: This light does not need to install any battery, just use the USB cable to connect to the mobile power supply and it can be used. Package Included: 1 piece x LED bicycle light, thank you.