The Streamlight TLR-1 Rail-Mounted Weapon Tactical Light with Mounting Keys is a powerful, intensely bright, long-running, aluminum-bodied gunmount light. This Gun Mounted Flashlights from the trendsetters at Streamlight sets a whole new standard for durability thanks to their shockproof, dustproof, and virtually indestructible design. The C4 LED of the Streamlight TLR-1 Tactical Flashlight won't break or burn out. The Streamlight TLR-1 Weapon Flashlight gives you the advantage in any low-light situation. Specifications for Streamlight TLR-1 C4 LED Rail-Mounted Weapon Flashlight: Manufacturer: Streamlight Light Output: 300 lumens Bulb Type: C4 LED Battery Type: CR123A Color: Black Gun Model: Universal Weapon Mount Type: Picatinny Weight: 4.18 oz Weather Resistance: Yes Finish: Anodized Condition: New Blade Material: Metal Overall Length: 3.375 in Features of Streamlight TLR - 1 Weapon Mounted Flash Light: Powered by two 3-volt CR123 lithium batteries with 10-year storage life; C4 LED technology, impervious to shock with a 50,000 hour lifetime (TLR-1: 300 lumens, TLR-1s: 300 lumens); Deep-dish parabolic reflector produces a concentrated beam with optimum peripheral illumination; Strobe function with user programmable strobe enable/disable (TLR-1s only); Run Time: 2.5 hours regulated run time. Solid-state current regulation for consistent illumination level; Rail grip clamp system securely attaches/detaches quickly and safely with no tools and without putting your hands in front of muzzle; 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 and S&W TSW; Machined aluminum sealed construction with black anodized finish; Waterproof to one meter for one hour, dustproof; Ambidextrous momentary/steady on/off switch; Double tap of momentary paddle within 0.4 seconds activates strobe. (TLR-1s only); Highly accurate sight repeatability when remounting; Fits existing light bearing holsters Lithium Battery Notice under TECH DOCS; IPX7 rated design; waterproof to 1 meter for 30 minutes; MIL-SPEC 810F Performance Tested; Mounts or Adapters for: Mossberg Shotguns (12 gauge), 12 ga. Shotguns, with extended magazine tubes, Remington 870,AR-15/M-16, MP-5, HK USP (Full Size) Handgun, S&W TSW,99 Package Contents: Streamlight TLR-1 / TLR-1S Rail-Mounted Weapon Tactical Flashlight