This is a magnetic USB Type C plug! They pair with the Black Woven USB A or Type-C to Type-C Cable with Magnetic Tip . Plug your USB C power (or data!) cable into one end, then insert the little magnetic nub into your device's charging port. Now you basically have a quick-detach USB C connector with a magnetic alignment. Easy to plug in whenever, no worries if the cable is yanked or twisted. 

Works great with any device or cable that has a USB C port. There are no active components in this adapter; it just takes one port and connects all the pins from one end to the other. Since USB C is reversible you can plug it either orientation.

Please note: this tip does NOT work with Magnetic Right Angle USB Type C Adapter - 120W Data and Power