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 Machined aluminum sealed construction with black anodized finish Dustproof Ambidextrous momentary/steady on/off switch Highly accurate sight repeatability when remounting Fits existing light bearing holsters 4.72 oz. Lithium Battery Notice under TECH DOCS MIL-SPEC 810F Performance Tested