The SureFire G2X Pro - Black is a compact yet powerful flashlight that's built for rugged and reliable performance. Its durable Nitrolon polymer body is smoothly sculpted for a secure, comfortable grip while also resisting scratches, abrasion, and corrosion. Construction also features anodized aluminum bezel and a tough polycarbonate window that resists impact. Plus, it's O-ring and gasket sealed for weatherproof protection. With no filament to burn out or break, the high-efficiency LED is virtually immune to failure. Offers two (2) light output levels: a brilliant, penetrating, perfectly pre-focused 320-lumen beam, and a 15-lumen low-output setting that lets you greatly extend the runtime per set of batteries - an invaluable option when you find yourself miles from civilization. Press the tailcap switch for momentary-on low, press further to click constant-on low, return to off and press or click on again within two seconds for high. A polycarbonate micro-textured reflector delivers a comparatively wider beam with generous peripheral light. Includes high-energy 123A batteries with 10-year shelf life.