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 power consevation) 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 the tailcap). Features: High-intensity light beam + turn cam action focus spot-to-flood Self-cleaning rotary switch 3 position On Off and Signal Spare lamp safely secured in the tailcap High-strength aluminum alloy cases O-ring sealed for water resistance Specifications: – Overall Length: 10″ – Barrel Diameter: 1 9/16″ – Head Diameter: 2 +” – Weight w/out battery: 14oz – Weight w/ battery: 23oz – Battery Life Continuous on time: 9-10 hours – Battery Voltage Output: 3.0 volts – Batteries Required: (2) D size alkaline