The Streamlight Double Clutch is a versatile dual-power headlamp that accepts either a rechargeable Li-ion battery or three AAA alkaline batteries. It features a unique rotating head switch to toggle between high and low modes and spotlight or floodlight functions. The lightweight polycarbonate body includes a 60-degree tilting head for precise light placement. Black Polycarbonate construction, OAL 1.60, Head Diameter 1.75, Weight 4 oz, Impact / Water Resistant, modes High / Low / Floodlight / Spotlight. Includes a rechargeable battery, USB cord, 120V wall adapter, and adjustable elastic and hard hat straps. It provides up to 18 hours of runtime and a maximum reach of 82 meters.