Compact, pocket size design for every day carry. Featuring a push-button tail cap switch with simple On/Off function and 3 selectable modes. Spot-to-flood adjustable LED (light emitting diode) beam. Anodized for corrosion resistance and durability. Rugged, machined aluminum case. Intelligent energy source management continuously monitors the balance between high brightness and efficient power usage allowing for prolonged battery life. Powered by (3) AAA alkaline batteries, included. Individually serial numbered. Length: 4.8 inches. Barrel diameter: 1-inch. Head diameter: 1-inch. Weight with batteries: 3.68 ounces.