These high-quality, ergonomically designed, one-piece adapters have a built-in LED power indicator, are Marine UL^® listed and are used much like Pigtail Adapters - however, they do not have sealing collars. Use only in an enclosed, dry location, such as powering your boat from a 15A power receptacle inside your house. Female connector (boatside) attaches to boat inlet or cordset. Male plug (dockside) attaches to the dockside receptacle or cordset. 5 year warranty. Not recommended for use in wet locations. Female (Boat) 30A 125V Locking Male (Dock) 20A 125V Locking