Marinco S30-15 (Old 81A) Straight Adapter Dock Side Male 30A/125V Locking to Boat Side Female 15 or 20A 125V Straight BladeA handy solution to convert 30A Shore power service to a 15A household plug. 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 and are not recommended for use in wet locations. Use only in an enclosed, dry location, such as powering your boat from a 15A power receptacle inside your house. Female