This is the BOSS DS-1X distortion effect pedal. I am selling this item to organize my equipment. I have confirmed that it works with both batteries and a power adapter. Please check the photos for the condition, as some of the label on the back is peeling off, and there are some scratches. Please understand this before purchasing. The knobs in the second image (mirror surface) were blurred due to strong reflections, but they are clean with no noticeable dirt. Type...Electric Guitar Manufacturer...BOSS