ball tab
The ball-tab prevents cable breaking because the cable is freely rotatable by ball hinge structure.

The shape of the ball-tab was based on an egg placed on an egg plate.

The ball contains a round iron plate, and outlet have  4 Neodymium Magnet.
 When adaptors and plugs over occcupy space, you can reduce the inconvenience of re-plugging or re-inserting the plug.

 It use Wireless Power Consortium through ball’s Secondary Coil and outlet’s  Primary Coil.
 The ball and the outlet are in contact with each other and current flows.