Streamlight Tactical Light with Integrated Red Aiming Laser - 300 lumens and 2.5 hours runtime; Powered by two 3-volt CR123 lithium batteries; Rail grip clamp system securely attaches quickly and safely with no tools; LASER ONLY runs 48 hours.; Rail grip clamp system securely attaches/detaches quickly and safely with no tools and without putting your hands in front of muzzle; Fast, Adjustable, Secure Side mounting to 1913 and Glock style Rails; Machined aluminum sealed construction with black anodized finish; IPX4 rated for water resistance; Ambidextrous momentary/steady on/off switch; Highly accurate sight repeatability when remounting; Fits existing light bearing holsters; Includes keys for Glock-style, Picatinny, Beretta 90two, S&W 99, S&W TSW and Sig P320 rails;