Features: Shock-proof, water-resistant, dust-proof, and virtually indestructible C4 LED technology, impervious to shock with a 50,000 hour lifetime Deep-dish parabolic reflector produces a concentrated beam with optimum peripheral illumination Powered by two (2) 3-volt CR123A lithium batteries with 10-year storage life Extremely durable anodized aluminum housing Extensively live-fire tested impact resistant construction Up to 2.5 hrs continuous run time (Laser/LED simultaneously). Laser only mode runs 45+ hrs. 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 Fast, Adjustable, Secure Side mounting to handguns with Glock-style rails and to all MIL-STD-1913 (Picatinny) rails Windage and Elevation adjustment screws mounted in brass bushings for long life and dependable zero retention. Highly accurate sight repeatability when remounting Ambidextrous momentary/steady on-off switch Fits all light-bearing holsters Includes keys for Glock-style, Picatinny, Beretta 90two, S&W 99 and S&W TSW Dustproof Backed by the Streamlight limited lifetime warranty Meets applicable European Community DirectivesSpecifications: Color: Black Battery Type: CR123 Additional Features: No Strobe Weight: 4.72 oz Length: 3.26 in Included Accessories: Laser Sight, No Strobe