I'm pretty sure I bought this from Stewart-MacDonald many years ago, some sort of bass pre amp 'mid booster'. Don't really know anything about it other than it's a push/pull pot, circut board, battery clip and labeled wires and it is some sort of mid booster. I think I paid $79 for it, and never installed it. They still have a strat version on the stewmac site but didn't see this one anymore. $25 shipped (as long as I can ship USPS priority to your address). Email me (preferred) or PM me if interested. - I have the documentation and wiring instructions scanned, I can email them to you if interested.