STREAMLIGHT TLR-3 Weapon Mounted TacticalLight with Rail Locating Keys SG69220 C4 LED delivers 4,100 candela peak beam intensity; 90 lumens. 2-3 times brighter than high-flux LED's. Parabolic reflector produces a concentrated beam with optimum peripheral illumination. Optimized electronics provide regulated intensity. Runs 1.5 continuous hrs. to the 10% output level Weighs 2.32 ounces (65.8 grams) with included battery - Length 2.71". Includes 5 interchangeable keys to fit a wide variety of weapons Rail clamp designed to rapidly attach/detach from side of weapon. One handed snap-on and tighten interface keeps hands away from muzzle when attaching/detaching Ambuyextrous momentary/steady On-Off switch - Body constructed of impact resistant Engineering polymer Face cap constructed of 6000 series machined aircraft aluminum with anodized finish - Borofloat high temperature glass lens Waterproof to 1 meter for 30 minutes. IPX7 rated Operating temperature: -40??F to +120??F. - Powered by one 3V CR2 lithium battery Serialized for positive identification - Limited lifetime warranty