Shore Power Stretcher.
This power adapter features a 45 degree angled connector to provide strain relief at the inlet. This adapter also helps extend the life of the heavy marine shore or RV power cords by not putting an undue burden on the cable if connected with a straight connector 

Connector with LED Power Indicator Light, Threaded Ring 
Approval: Plug, STOW: UL, C-UL
Limited one year warranty