Up for sale we have a Ross Compressor pedal in fully functional, very good condition. There is velcro on the back as shown in pictures. In general, a compressor is designed to even out the volume of an instrument across various input levels.  So it boosts quieter signals and squashes louder ones to keep the sound within a given range. Control knobs are sustain and output. The connectors are input, output, and power. Power supply is not included.

Ships from Athens, GA.