Cutting edge C4 LED technology and internal reflection optics make this ultra-compact light super-bright and ultra-convenient. Powered by two AA alkaline batteries (included). C4 technology produces 2 to 3 times the output of previous LEDs. Up to 1,600 candela and 55 lumens typical Up to 4 hours of run time. Unbreakable polycarbonate lens. Push-button tailcap - steady on and momentary on/off operation. Shock resistant, water resistant. Includes black nylon flapless holder.