New in package, this is an Electric Vehicle charging adapter with 10-50P plug on one end and 14-50R receptacle on the other.  NEMA rated.  Level 2.  LTL listed.

Right angle receptacle, make sure your car can handle this connector.

It also features a three-finger grip to help pull the connector from the car.

This is not an adapter for your RV, stove or air condition that requires a ground connection; please see the label picture, it is for charging an EV.