1000 lumens 245 m beam; runs 1.5 hours (Laser/LED simultaneously). Laser only function runs 17 hours. Green laser with wide operating temperature range. Green laser provides high-visibility long-range targeting, even in daylight. Powered by two 3-volt CR123 lithium batteries for optimal performance, even in cold weather. 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 and Sig P320 rails. Machined aluminum sealed construction with black anodized finish. Ambidextrous momentary/steady on/off switch. User programmable strobe can be enabled/disabled. Fits existing light bearing holsters. 3.39 (8.61 cm); 4.78 oz (135.5 grams) with batteries. Operating temperature: -40°F to +120°F.