A robust model to hold / mount your devices on the wall. I personally use it to mount my android TV Box on the wall ( this is why i added the mesh in the back so it have a bit of ventilation and also save a bit of fillament).
The scad file is in included, so you can port it in OpenScad and make changes to fit your desired devices more accurately and also improve the design to better feel your needs!

Some additional details regarding the printing :

1. if you want great quality at the arch area, you should probably use supports for the arches (or slow down the printing speed when it is at that point), I personally did not use and the result is as in the image (which is pretty satisfying to me and for my purpose)
2. I used 3 wall loops ( Strength > Wall Loops ) , which while it made it really strong, it was probably an overkill. 2 would be perfect and waste less filament