Securely attaches to select GLOCK, SIG SAUER, Smith & Wesson, Beretta, Springfield Armory, and Heckler & Koch railed subcompact handguns; 500 lumens; 140 m beam; runs 1.5 hours; Ambidextrous rear paddle switches; Uses one (1) CR123A lithium battery (included); Safe-off feature prevents accidental activation; saves batteries; Rail clamp system securely attaches/detaches quickly and safely with no tools and without putting your hands in front of muzzle; Durable, anodized machined aluminum construction; User-enabled strobe function; IPX7-rated; waterproof to 1 m for 30 minutes; Assembled in the USA