The Argo features state-of-the-art C4® LED technology for the long life and reliability of an LED with the brightness and range of a conventional bulb. It offers three digitally controlled brightness levels, battery indicator, a durable compact case, and rubber & elastic head straps for use with hard hats. Improved C4® LED lamp Three (3) digitally controlled brightness levels: High – Up to 9,2500 candela (peak beam intensity), 150 lumens measured system output, 190m beam distance Medium – Up to 6,375 candela (peak beam intensity), 100 lumens measured system output, 160m beam distance Low – Up to 2,750 candela (peak beam intensity), 45 lumens measured system output, 103m beam distance. Pushbutton switch – hold three (3) seconds for "blink mode" High: 3 hours continuous runtime to the 10% output level. Medium:4.5 hours continuous runtime to the 10% output level. Low: 30 hours continuous runtime to the 10% output level. 90º tilting head Includes elastic head strap and rubber hard hat strap Powered by (3) "AAA" alkaline batteries (Batteries Included); LED battery indicator on back IPX4 rated for water resistance 4.75 oz. Streamlight Argo Headlamp 61301