The Electro-Harmonix BIG MUFF, an effects pedal with three controls: Volume, Tone, and Sustain. - Model: BIG MUFF - Brand: electro-harmonix - Controls: Volume, Tone, Sustain - Country of Manufacture: USA - Condition: Used, with scratches Thank you for viewing. I purchased this approximately 15 years ago. I do not currently have any instruments on hand, so I have not confirmed its operation. Therefore, I would appreciate it if you would consider it as-is.