Electro-Harmonix Op-Amp Big Muff Pi Fuzz Pedal Features:

• Captures Billy Corgan (Smashing Pumpkins)'s iconic fuzz sound

• Based on the late-'70s op-amp equipped V4 IC Big Muff Pi

• Easier-traveling compact size

• Durable die-cast construction

• True bypass switching preserves tone between uses

• Independent Volume, Tone, and Sustain (gain) controls

• Tone bypass switch temporarily toggles the tone circuit for added power

• Powered by a 9-volt battery (included) or standard 9-volt adapter (sold separately)