1000 lumens; 20,000 candela peak beam intensity; 283 meter beam; runs 1.5 hours White LED technology, impervious to shock with a 50,000 hour lifetime. TIR optic produces a concentrated beam with optimum peripheral illumination Mounts directly to handguns with Glock-style rails and to all MIL-STD-1913 (Picatinny) rails; verify compatibility and fitment prior to purchase, Rail grip clamp system securely attaches/detaches quickly and safely with no tools and without putting your hands in front of the muzzle Includes keys for Glock-style, Picatinny, Beretta 90two, S&W 99 and S&W TSW and Sig P320; verify compatibility and fitment prior to purchase Rail clamp system securely attaches/detaches quickly and safely with no tools and without putting your hands in front of the muzzle; fits existing light bearing holsters; user programmable strobe can be enabled/disabled