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 one will eventually become a legendary piece! m(_ _)m No pets, no smokers. Please, no returns or exchanges. m(_ _)m Thank you for looking.