Electro-Harmonix BIG MUFF with Volume, Tone, and Sustain controls. - Model Name: BIG MUFF - Brand Name: electro-harmonix - Controls: Volume, Tone, Sustain - Country of Manufacture: USA Based on the pot date, I think it's from 1982? m(_ _)m It's in good condition and fully functional! I don't quite understand the value of the BIG MUFF myself, but I think this unit will eventually become a legendary piece! m(_ _)m No pets, no smokers. No returns or exchanges, please m(_ _)m Thank you for looking.