Surefire M640U-BK-PRO 6-Volt Ultra-High-Output LED Scout Light® Pro w/ Z68 Tailcap. Recoil-proof, ultra-high-output LED delivering 1000 lumens of white light. TIR lens shapes the light into a far-reaching beam with surround light for exceptional peripheral vision, making it ideal for medium to longer-range applications. New Low-Profile Mount (LPM) delivers versatility, allowing the user to optimize the lights position relative to the rail. The LPM attaches to any MIL-STD-1913 or M-LOK rail. Activated by either clicking its push-button tailcap switch. Constructed of lightweight aerospace aluminum with Mil-Spec Hard Anodized finish, and O-ring seal. Built to endure in combat without any sacrifice in weapon maneuverability. FEATURES: -Virtually indestructible ultra-high-output LED 1,000 lumens-Versatile Low-Profile Mount-TIR lens shapes beam with enough reach and surround light for indoor/CQB and outdoor/medium-to-long-range operations -Black Mil-Spec hard-anodized aluminum body and tempered window-Activation via Z68 momentary/constant-on push-button switching with protective shroud-HIGH OUTPUT: 1,000 lumens-HIGH RUNTIME: 1.25 hours-PEAK BEAM INTENSITY: 11,300 candela-BATTERIES: Two 123A lithium (included.)-SWITCHING: Click tailcap-WEIGHT W/ BATTERIES: 4.8 oz. (136 g)-BEZEL DIAMETER: 1.125 in (2.9 cm) -LIQUID INGRESS PROTECTION: IPX7-LENGTH: 5.5 in (13.9 cm) USA