TLR-3 Ultra lightweight & compact, the TLR-3® Weapon-Mounted Tactical Light features the latest in C4® LED technology and provides 1.5 hours of continuous runtime from a single lithium battery. Rail clamp designed to rapidly attach/detach from side of weapon. Models also available for H&K USP Compact frame and H&K USP Full Size frame. C4® LED delivers 3300 candela peak beam intensity; 170 lumens Runs 1.5 continuous hours to the 10% output level Textured parabolic reflector produces a concentrated beam with optimum peripheral illumination; optimized electronics provide regulated intensity Compact - Weighs 2.32 ounces (65.8 grams) with included battery; 2.71 in. (6.88 cm) Key kit included for mounting to a variety of weapons (H&K USP models do not include key kit) 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 Ambidextrous momentary/steady On-Off switch Uses one 3V CR2 lithium battery (included) Impact-resistant Engineering polymer construction with durable anodized aluminum facecap Borofloat high temperature glass lens IPX7 waterproof to 1 meter for 30 minutes Operating temperature: -40°F to +120°F. Serialized for positive identification Models also available for H&K USP Compact frame and H&K USP Full Size frame Limited lifetime warranty Assembled in USA