300 lumens; 2.5-hour run time; 12,000 candela peak beam intensity Powered by two (2) 3-volt CR123A lithium batteries Rail grip clamp system securely attaches/detaches quickly and safely with no tools  High Lumens - 300 Run Time - 2.50 hours Max Candela - 12,000 Battery Type - CR123A Lithium Battery - Quantity 2 Length - 3.39 inches (8.61 centimeters) Weight - 4.18 ounces (118.50 grams) Color - Black