The same great features of the TLR-1 with an integrated laser sight for accurate aiming. Powered by two 3-volt CR123 lithium batteries with 10-year storage life. Shockproof super high-flux LED with blinding beam (up to 80 lumens) with bright side-light – will not break or burn out. Up to 2.5 hrs runtime (laser-only mode runs 45 + hrs.) 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. Ambidextrous momentary/steady on/off switch. MIL-SPEC 810F Performance Tested.