Got this for a project. It's seen very little use. It has no knobs. (bought it that way) Ships in the project case. Pre-wired, with one input and one output jack. Currently wired as a 9 volt system. 3 band. The mid control has a push pull pot. I think its 250 or 800hz. You have to order knobs from here: http://www.bestbassgear.com/knobs.htm The knobs cost 10 each. Two of the pots are concentric, one is standard. See below. 2 Pickup - 3 knob configuration Controls: - Volume/Volume Stack - Mid (push-pull freq selector) - Treble/Bass stack $100 shipped PayPal CON USA via USPS.