This is a BOSS DS-1, made in Taiwan in 1989, based on the serial number. I am selling it to organize my equipment. Operation has been confirmed with an AC adapter. I rechecked for any scratchiness when listing it, but there was none. However, it is old equipment. Please refrain from purchasing if you do not understand this, or if you are sensitive to such things. *No returns or exchanges! *Please do not negotiate the price. Brand: BOSS Type: Electric Guitar Effects Pedal Distortion