The Electro-Harmonix BIG MUFF is a guitar effects pedal with three control knobs: Volume, Sustain, and Tone. - Model Name: RAM'S HEAD BIG MUFF Pi - Brand: electro-harmonix - Control Knobs: Volume, Sustain, Tone - Input Jack: 1/4 inch - Power: 9V adapter compatible Purchased new and used only briefly indoors. In excellent condition. Selling to clear out gear. Sound tested and confirmed working. Box and all accessories included. ★ Also listed on other sites, so may be removed suddenly. Please understand that we may have to cancel the order if it sells out due to timing. Electro-Harmonix Big Muff Fuzz ramshead Ram's Head