These tough, durable, waterproof lights are ideal for a variety of tasks. Black anodized machined aluminum housing. High intensity LED lasts 100,000 hours. White LED: 10 lumens, Blue LED: .71 lumens. Powered by 3 AAA alkaline batteries (included). Runs up to 60 continuous hours. Momentary “blink” and constant “on” modes. Serialized for easy identification. Pocket clip for easy access. Weight (with batteries) 1.1 ounces. Size: 6.21″ x .365″ . Choose white or blue light.