Description Life waterproof, which means it is protected against splashing or spraying water from any angle. Super bright, 2400 lumens, 200-500 meters, 100% waterproof, energy efficient design, longer life 100,000 hours. Lightweight heavy duty adustable strap, made of high quality material, strap is fully adjustable with an elastic stretch for a for perfect fit. Suitable for running, jogging, camping, fishing, and shooting, reading, hiking, caving, climbing, biking. Comfortable and Fit, super adjustable system bands will provide maximum comfort. That balances perfectly between the front and back of your head. Actually, after a couple of minutes you’ll even stop noticing you are wearing. Specification: Lens material: flat lens. Applicable battery: 2* for 18650. Flow brightness: 2400 lumens. Material: aluminum alloy. Working voltage: 3.7V. Light source color temperature: 6000K. Colour: Black. Whether to focus: No. Note: There might be a bit color distortions due to different computer resolutions. There might be size errors due to different computer resolutions. Package include: Type 1: 1 * head light 1 * charger. Type 2: 1 * head light 1 * charger. 1 * car charge. Type 2: 1 * head light 1 * charger. 1 * car charge. 1 * usb cable.