Streamlight Enduro Headlamp keeps shining bright for up to 24 hours... SAVE BIG! One of the lightest , brightest, most comfortable head-lamps available today. The Streamlight Enduro features High and Low lighting modes and a runtime up to 24 hours thanks to the solid state power regulator... you get maximum light output throughout battery life. Plus all the other functions that make Streamlight the choice of serious adventurers. Yours at a nice savings off the in-store price thanks to my volume-negotiating power. More: 1/2 watt high-flux,100,000 hour life LED... up to 14 1/2 lumens typical and up to 850 peak beam candlepower (high mode); 6 lumens typical (low mode); 90 tilting head puts the light wherever you need it; Impact-resistant, drop-tested ABS housing is O-ring sealed, waterproof to 1 meter for 1 hr.; Includes rubber / elastic combo head strap; Powered by 3 AAA alkaline batteries... LED battery life indicator built in; Approx 2 1/4 x 3 x 2 1/4 , 4 3/4 ozs. Light up the night with one of the finest flashlights going.