DOD FX70C CORROSION Purchased about 15 years ago. Functionality confirmed. Circuit configuration similar to Boss MT-2. It's like the MT-2 but without the mid control. It's an old item, so the pots have a little scratchiness, but it should improve with use. Operation confirmed with batteries. If you want to use an AC adapter, a standard Boss-type AC adapter cannot be used. A conversion cable is required. Please refrain from purchasing if you are concerned about this.