Intensely bright, virtually indestructible tactical light, attaches/detaches to almost any gun in seconds. Now featuring the latest C4® LED technology producing 2 to 3 times the output of previous LEDs. Powered by two 3-volt CR123 lithium batteries with 10-year storage life. C4® LED technology, impervious to shock with a 50,000 hour lifetime. LED Rating: Up to 7,000 candela peak beam intensity and up to 135 lumens measured system output. Deep-dish parabolic reflector produces a concentrated beam with optimum peripheral illumination. Run Time: 2.5 hours regulated run time. Solid-state current regulation for consistent illumination level. Rail grip clamp system securely attaches/detaches quickly and safely with no tools and without putting your hands in front of muzzle. Mounts directly to handguns with Glock-style rails and to all MIL-STD-1913 (Picatinny) rails. Includes keys for Glock-style, Picatinny, Beretta 90two, S&W 99 and S&W TSW. Machined aluminum sealed construction with black anodized finish. Ambidextrous momentary/steady on/off switch. Highly accurate sight repeatability when remounting. Fits existing light bearing holsters. 4.18 oz. Lithium Battery Notice under TECH DOCS. IPX7 rated design; waterproof to 1 meter for 30 minutes. Dustproof.