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 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". Barrell diameter: 1". Head diameter: 1". Weight with batteries: 3.68 oz.