The only machined aluminum flashlight to earn a UL listing for Class I, II , Div 2. 3.7V, 6 watt xenon gas filled bulb, adjustable beam focus to15,000 candle power. Spare Bulb in the end cap. Anodized against corrosion. Self cleaning- switch Unbreakable polycarbonate lens. 3-cell 3.6 Volt nickel cadmium sub-C battery recharges up to 1,000 times. 7.38" length.