Every Mag-Lite flashlight embodies a precise balance of refined optics efficient power durability and quality. Each Mag-Lite D-Cell flashlight includes A bright focusable LED ( for powerconsevation) or the high intensity White Star Krypton Gas Lamp (stored in Tail Base) for enhanced brilliance and extended range.Interchangeable Light Sourcing - Use either the installed LED module or the Krypton lamp (stored in thetailcap).Features:High-intensity light beam turn cam action focus spot-to-floodSelf-cleaning rotary switch 3 position On Off and SignalSpare lamp safely secured in the tailcapHigh-strength aluminum alloy casesO-ring sealed for waterresistanceOverall Length: 12 11/32Barrel Diameter: 1 9/16Head Diameter: 2 Weight w/out battery: 15ozWeight w/ battery: 30ozBattery Life Continuous on time: 9-10 hoursBattery Voltage Output: 4.5 voltsBatteries Required: (3) D sizealkaline