The TLR-9 includes customized ergonomic switches featuring a low or high position to match your shooting style. It features an ambidextrous on/off switch and a rail clamp that is designed to rapidly attach/detach from a broad range of full frame weapons. Its low-profile design prevents snagging and a "safe off" feature prevents accidental activation, saving batteries. Product Details 1,000 lumens; 200m beam; runs 1.5 hours Custom optic produces a concentrated beam with optimum peripheral illumination Ambidextrous on/off switch Uses two CR123A lithium batteries (included) Safe off feature prevents accidental activation; saves batteries Rail grip clamp system securely attaches/detaches quickly and safely with no tools and without putting your hands in front of muzzle Securely fits a broad range of full-sized handguns Durable, anodized machined aluminum construction User enabled strobe function 3.87" (9.82 cm); 4.26oz (120.9g) IPX7 waterproof to 1m for 30 minutes Limited lifetime warranty Assembled in USA