The failsafe brightness you need for tactical situations in an ultralight, compact size. Use the innovative rail clamp to rapidly attach or detach the light from your weapon. Shockproof C4 LED generates a 110-lumen output — that’s 2-3 times brighter than high-flux LEDs. It also has a 50,000-hour lifetime. Parabolic reflector concentrates beam for bright on-target illumination. Waterproof, impact-resistant polymer case with Borofloat high-temperature glass. Ambidextrous momentary or constant-on switch. Powered by one CR2 lithium battery for up to 1-1/2 continuous hours. Includes five interchangeable keys to fit a wide variety of weapons. Manufacturer’s limited lifetime warranty. Weight: 2.32 oz. with battery. Dimensions: 2.71"L x 1.18"W x 1.5"H.