Reverse "Y" AdapterThe Reverse "Y" Adapter has two male plugs with special power isolation circuitry for added safety. When one plug is connected to a receptacle, the circuitry isolates the second plug. The reverse "Y" provides 50A 125/250V power when only two 30A 125V receptacles are available. Note: Reverse "Y" will NOT work with 50A, 125V, 3-wire inlets. Power is provided in both circuits to the 4-wire inlet, but the dock side receptacles limit the current in each circuit to 30A. The two 30A 125V receptacles must be supplied from a single power source providing from 208V to 250V between them for proper operation. Boat Side: Female Connector 50A 125/250V w/Sealing Collar System Attaches to boat inlet or cordset Dock Side: Male Plug 2-30A 125V Locking Attaches to dockside receptacle or cordset WARNING: This product can expose you to chemicals including di(2-ethylhexyl)phthalate (dehp) which is known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov. Specifications: Type: Y-Adapter Box Dimensions: 5"H x 12"W x 13"L WT: 7.4 lbs UPC: 093344501357 Quick Guide (pdf)