This is a holder for an aftermarket Apple 45W MagSafe 2 power adapter (for a MacBook Air 2012-2017) I bought on Amazon UK as a replacement for the original one. It's wall mountable via 3M Command adhesive strips (the space between the perimeter and the hole in the middle fits them nicely). It has two offset notches for the power cord and output cable, plus two further finger notches for easily removing the power adaptor.
El autor ha marcado este modelo como su creación original.