This is an old Maxon wah pedal. I didn't like it much, so I'm selling it. It has quite a few scratches, but there are no issues with its operation. I had it on my effects board for about six months, but I hardly used it. It doesn't have a DC jack, and it's only battery-powered. I was using a power supply with the battery snap to DC jack adapter shown in the picture. There were no problems using it this way. I'll include this adapter. It's an old item, so please refrain from purchasing if you are sensitive to such things.