The Streamlight® TLR-1 HL® Tactical Gun-Mount Light mounts directly to your firearm, allowing you to control the weapon and the light as one. The TLR-1 HL puts out 1000 lumens for maximum illumination to clearly identify potential threats using the cover of darkness as an advantage. The light produces a concentrated beam with optimum peripheral illumination. The ambidextrous on/off switch is easily reached; and a user programmable strobe can be enabled for disorienting and confusing adversaries, or disabled when not needed. An integral rail clamp system securely attaches/detaches the unit with no tools to handguns with Glock-style rails and to all firearms with MIL-STD-1913 (Picatinny) rails. The TLR-1 HL comes with several keys, which are interchangeable to specific handguns, including Beretta®, and Smith & Wesson®, by removing the nut on the side and slipping the new bracket key in its place. Machined aluminum sealed construction and C4® LED technology enables the Streamlight TLR-1 HL Tactical Light to withstand the recoil and abuse of being attached to a firearm for thousands of rounds. Powered by two 3-volt CR123 lithium batteries. Operates between -40°F and +120°F. IPX7 waterproof to 1 meter for 30 minutes.