Electro-Harmonix Big Muff Pi with Tone Wicker BUNDLE w/ ZORRO Series DUNLOP Sample Pick Pack, Dunlop ZWN 1046 Electric Nickel Medium Guitar Strings 10-46 & 2 Patch Cables (6") True bypass The Wicker switch opens up 3 high-frequency filters providing a sustain that is raspy and defined The Tone switch completely removes the tone control, providing a devastating broadband Big Muff slam With the Wicker switch off and the Tone switch on, you have the original Big Muff Pi