Although designed for the Ikea Friheten's arm, it will fit over anything that is less than 120mm in width. It has three 55mm x 40mm storage areas for various remotes and a slot for holding compact HTPC keyboards. The storage areas use removable partitions so you can leave them out if you need more space. On one side there are two holes for M3 Heat-set Inserts spaced 85mm apart, allowing the addition of other organizers to the back.
I have the remote for my LG TV, AppleTV, soundbar, a Logitech combo keyboard one one side and a modified PS5 controller holder from Vlastimil posted here. This design was inspired by another design for the Friheten found here.
It should be printed on it's side with at least 4 perimeter walls for added strength. I've included a version with a 0.2mm bridge element to reduce the amount of support needed if you want an extra clean wall surface.
The author hasn't provided the model origin yet.