High power LED for extreme brightness; Ambidextrous momentary/steady On-Off switch; One handed snap-on & tighten interface keeps hands away from muzzle when attaching/detaching; Securely fits a broad range of weapons; 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, S&W TSW and Sig P320 rails; Extensively live-fire tested impact resistant construction; Operating temperature: -40F to +120F; IPX7 rated design; waterproof to 1 meter for 30 minutes; Serialized for positive identification