Shelf systems can be configured to couple an electronic device to a wall. In some embodiments, shelf systems include a base having a backside configured to face inward towards the wall and a frontside configured to face outward away from the wall. Shelf systems can also include a first sidewall and a second sidewall that are coupled to the base, protrude away from the wall, and help secure the electronic device to the base. In several embodiments, a level is configured to indicate a horizontal condition of the shelf.