Marshall guitar effects pedals that achieve a variety of tones. - Brand: Marshall - Model Name: The Guv'nor - Controls: GAIN, BASS, MIDDLE, TREBLE, LEVEL - Power: +9V DC - Input/Output Terminals: INPUT, LOOP, OUTPUT Operation has been confirmed. There is some scratchiness, but it depends on the individual, so I do not recommend it to those who are concerned. It was purchased about 30 years ago, at the time of its release. It will take about a week to ship. No box No instruction manual Thank you for viewing.