2-AA, 1 watt LED Overall length: 6.8" Head diameter: 1.5" Head, body and end cap are made of black anodized aluminum with black rubber over molded on head and end cap Head has a water resistant o- ring Water resistant push button switch with rubber over mold End cap has a large thru hole for lanyard, carabineer or hanging hook Lexan polycarbonate lens Bulb is LED-no replacement necessary Includes 2-AA batteries Nylon black carry holster with metal belt clip Velcro closure flap