Marinco Dockside 30A to Boat 15A Shore Power Adapter- GCFIThe Marinco Dockside 30A to Boat 15A Shore Power Adapter with Groud Fault Circuit Interrupter (GFCI) is a dockside adapter that offers a safe hook up to 30A power by providing against harmful electric shock and reducing the possibility of fire. Can be used outdoors in hars environments. A GFCI limits the duration of an electrical shock to a period considered safe for healthy people. It does not prevent shock. Product Features: Provides safer hook=up to 30A dockside power; Provides protection against harmful electric shock; Reduces the possibility of fire; Offers protection for up to3 attached tools; Corrosion resistant and rain=proof rated for outdoor use; GFI trip level of 4-6 mA; Can also be used for other outdoor, harsh environments such as construction sites or wherever ground fault protection is desired.; Boat Side Female Connector attaches to boat inlet or cordset. 3 - 15A 125V Straight BladeDock Side Male Plug attaches to dockside receptacle or cordset. 30A 125V Locking Plug