This a simple holder for the AVM FRITZ!Box router designed for the IKEA SKADIS pegboard. It perfectly fits the mounting holes on the back of the router so it can easily be put into position. As far as I know, all the currently available FRITZ!Box models have those same mounting holes.
To print this design properly you will need to enable support structures in your slicer because the part that fits the router has nothing below it while printing. Those support structures are usually removable without any problems after the print.
The author marked this model as their own original creation.