Ultra lightweight and compact, the TLR-3 Weapon Mounted Tactical Light features the latest in power 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. Case body made using impact resistant nylon polymer. Face cap made using 6000 series machined aircraft aluminum with anodized finish. Lens made with borofloat high temperature glass. C4 LED technology, impervious to shock with a 50,000 hour lifetime. 4,100 candela peak beam intensity and 90 lumens measured system output. Parabolic reflector produces a concentrated beam with optimum peripheral illumination. Optimized electronics provide regulated intensity. Ambidextrous momentary/steady On-Off switch. Run time: 1.5 continuous hours to the 10% output level. Extensively live-fire tested. Operating temperature: -40 to +120 Degree Fahrenheit. IPX7 rated design. waterproof to 1 meter for 30 minutes. Serialized for positive identification. Features a full USP clamp. Model for H and K USP Full frame. This model does not include key kit.