Ultra lightweight and compact, the TLR-4 Weapon Mounted Tactical Light with integrated aiming laser features the latest in C4 LED technology. The light provides 1.5 hours of continuous runtime when in dual mode with the high power visible laser. Rail clamp designed to rapidly attach/detach from side of weapon. Model for H and K USP Full Size frame. Case body is made from impact resistant Engineering polymer. Face cap is made using 6000 series machined aircraft aluminum with black anodized finish. Borofloat high temperature glass lens. Light source uses C4 LED technology, impervious to shock with a 50,000 hour lifetime. 5,000 candela peak beam intensity and 110 lumens measured system output. Textured parabolic reflector produces a concentrated beam with optimum peripheral illumination. 640-660nm red laser provides long-range targeting. Optimized electronics provide regulated intensity. Ambidextrous momentary/steady On-Off switch. Three position Mode Selector switch for Laser only, LED illumination only or both Laser and LED. Run time is 1.5 hours regulated run time to the 10% output level for LED only or LED and Laser. Run time is 11 hours regulated output for Laser only. This model does not come with key kit.