C4 LED is 2 times brighter than a Super high-flux LED, delivers 120 lumens. LED is impervious to shock and never needs replaced. Rubber armored sleeve provides a "sure-grip" in all weather environments. Anti roll head keeps the light in place. Easy to use push button tail "on-off" switching This compact, machined aluminum flashlight is one of the brightest, lightest personal flashlights ever created. Up to 3.5 hours runtime to the 10% output level. Up to 7,500 peak beam candlepower. Powered by two 3 volt lithium energy cells, LED has a 50,000 hour lifetime and never needs replaced. O-ring sealing protects against moisture. Length: 5.72"; weight: 5.3 oz. Limited lifetime warranty.