The dimensions and proportions are chosen so that a Sonos Era 100 can stand on it stably without overhanging or wobbling. The material appears sturdy enough to permanently support the weight of the speaker. Under the shelf, there are two symmetrical, triangular braces that run diagonally downward from the underside of the platform to the wall mounts. These provide the necessary stability and load distribution. The inner edges of the braces are curved, which is both aesthetically pleasing and makes efficient use of material. The vertical mounting plates on both sides are also integrated and have multiple screw holes to securely attach the holder to the two walls of the corner. Additionally, the construction is designed to be open so that a power cable can easily be routed downward – ideal for operating a speaker like the Sonos Era 100.