It comes with a black (only one color available) non-resonant composite enclosure. The structural design is a three-sided cabinet focus to hopefully minimize its appearance on walls and shelves. The goal of the the RM7 design is for it to be unobtrusive and hidden. It comes with a cradle to make it easy to put it on a shield and measures 3-13/16" height, 9-7/16" width, 3-3/4" depth. It is magnetically shielded, making it safe to place next to or near electronic equipment such as computers, computer monitors or TVs.