Automatic Man Overboard Light for Ring Buoy Toughest construction yet relatively small and lightweight. Made from injection molded plastic that is almost indestructible. Merely pick it up and point, it starts automatically. When thrown overboard, the light automatically commences to flash a bright flashing strobe light visible for miles. Not only a great aid for the searcher, but aids the man overboard to find a life ring buoy or horseshoe buoy. Features the most solid state circuitry available today to provide years of reliable service. Extensively tested to withstand 90 ft. drops into the ocean. Uses 4 alkaline "D" cell batteries available everywhere (batteries not included). Boxed individually in a 6 pack master carton, shipping weight: 13 lb.