This is a Rauland Spectrum Master Model 626 1/3 octave audio equalizer, 600 ohm balanced, in/out transformer isolated.  This is in used condition.  It powers up and is presumed to be in good working order.  This is 11" deep, 5" high and 19" wide including the face plate.  It has a detachable front cover to protect the controls as shown in the photo.  I try to give as accurate of a description as I can and point out any flaws that I notice in an item.  If I overlook something, please bring it to my attention so I can address the issue.  I want you to be happy with your purchase!