SmartPlug B50ASSY 50 Amp Boatside Inlet & Connector - 50A 125V/250V Retrofit Kit - The SmartPlug 50 amp retrofit kit includes the 50 amp stainless inlet (BM50S) and 50A connector (BF50), everything you need to protect your boat from shore power overheating. Installation of both components is easy. The kit is designed to fit on 125V/250V systems with multiple seals on the connector to ensure a watertight fit on an existing cordset. - Features - Can be used with 125V or 250V service Can be plugged in easily in the dark or awkward locations effortlessly 20x more electrical contact means no overheating Weatherproof seals to eliminate corrosion Triple locks are stronger and easier to use Lid locks in closed position