Like the legendary Big Muff Pi of the '70s, the reissue Electro-Harmonix USA Big Muff Pi Distortion/Sustainer Pedal has 3 controls that let you dial in the finest harmonic distortion/sustain ever produced. The Volume control adjusts the output level. The Sustain control optimizes the long sustain with just the right amount of harmonic distortion. The Tone control provides a range of sounds, from warm bass to crisp treble.

Features:

• True bypass
• Singing sustain with attitude
• Crushing distortion
• Adjustable tone
• 9-volt battery included
• Optional 9DC-100 power supply available