This is a custom made bracket that is used to mount your router / modem to the wall without drilling any holes in the wall.
It is designed to mount to a receptacle box by removing the cover, mouthing this bracket, and then replacing the cover.
It has a 7" x 5" X 3/4" thick block of oak wood on the bracket. You can change it, make it larger, or smaller as you need to mount your equipment.
The whole assembly can be repainted to match a wall if you desire.
This is great if you are renting and not allowed to drill your walls.
It is used and sold as-is with no returns.