1,000 lumens; 1.5-hour run time; 20,000 candela; 283 m beam distance Powered by two (2) 3-volt CR123A lithium batteries Rail grip clamp system securely attaches/detaches quickly and safely with no tools and without putting your hands in front of the muzzle  High Lumens - 1,000 Run Time - 1.50 hours Beam Distance - 283 meters Max Candela - 20,000 Battery Type - CR123A Lithium Battery Quantity - 2 Length - 3.39 inches (8.61 centimeters) Weight - 4.32 ounces (122.47 grams) Colors - Black