The Electro Harmonix Nano Big Muff Pi is a Guitar Effects Pedal, True Bypass, Distortion We took the Big Muff Pi circuit and simply shrunk it without changing its rich, creamy, violin-like sustain and sound. The Nano Big Muff Pi works and sounds identical in every way to our classic NYC Big Muff

• Crushing distortion
• Singing sustain with attitude
• Compact, rugged nano enclosure
• True bypass
• Adjustable tone
• 9-volt battery included