Ultra-bright LED headlamp featuring a high flux, 100,000 hour life LED and two levels of lighting. Waterproof to 1 meter for 1 hour. LED provides up to 14.5 lumens (850 candlepower) on high power and 6 lumens on low power. Run times of up to 6 hours on high power and up to 24 hours on low power. Includes rubber/elastic combo head strap and 2 "AAA" alkaline batteries. The Enduro Headlamp is one of the brightest, lightest, most compact headlamps for the price. Ultra-bright, the Enduro sports a 0.5 watt LED. LED, never needs replacing. It uses (2) "AAA" batteries and has 2 lighting modes: Low beam, runtime of 24 hours, High beam, runtime of 6 hours. 18 Lumens of light, a solid state power regulator maintains maximum light output throughout the life of the battery. Impact Resistant: Polycarbonate lens and body. Water Resistant: O-ring sealed. Packaged with Non-slip comfort head strap. Face cap diameter, 1.3", headlight width, 2.25", headlight depth, 1.6", Weight: Only 2.75 ounces (with batteries). "No Excuses" .