This is the monophonic, high-impedance version of Boss’ volume/expression pedal. It is optimal for most guitars and basses with passive electronics. The pedal is built like a tank from solid diecast aluminum alloy. It has an instrument input and two outputs for use as either a volume pedal or an expression pedal when fed into an effects device. It has a side knob to control minimum volume if you don’t want the instrument all the way off when the pedal is rocked back. There is also a tuner output that works even when the instrument output is zero. It has a screw on the bottom panel to adjust tension for a lighter or heavier rocker feel. The pedal is in mint condition with no dents, dings, scratches or Velcro residue. I tested it before listing and it works as it should, with smooth activation and no noise. It will come in its original box with packing material and papers.