The same great features of the TLR-1 with an intergrated laser sight for accurate aiming. Powered by two 3-volt CR123A lithium batteries (included) with 10-year storage life. Shockproof 3-watt Luxeon LED with blinding beam (up to 80 lumens) with bright side-light - will not break or burn out! Up to 2.5 hour 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 the muzzle. Fast, Adjustable, Secure Side mounting to 1913 and Glock style Rails. Machined aluminum sealed construction with black anodized finish. Dustproof. Ambidextrous momemtary/steady on-off switch. Highly accurate sight repeatability when remounting. Fits existing light bearing holsters. 4.72 oz MIL-SPEC 810F Performance Tested