Thin square shape compared to our previous model (SB-W116), the vertical and horizontal sizes are made with a thin 4.1 inches (103 mm) deep. The poly bag with elastic cord can be used as a stain resistant cover. After installation, you can put it on the speaker to prevent dirt from sticking to the surface before delivery. Comes with wire to prevent falling (between adapters/speaker boxes). After fixing it to the wall, you can easily connect it with both hands. The back part with various terminals can be fixed to the wall and then wired, so you can work with both hands. In addition, the space around the terminal block makes it easy to do various wiring work.