Electro-Harmonix Little Big Muff Pi Fuzz / Distortion / Sustainer Pedal. The same silky smooth violin-like sustain and creamy tone as the Big Muff Pi, in a compact die-cast box! The EHX Little Big Muff Pi is identical to our Big Muff Pi but smaller. We took the classic Big Muff circuit and simply shrunk it without any change to the sweet violin-like sustaining sound. This little brother displays its heritage proudly. Product Highlights: Tough and compact die-cast chassis. 9V battery included. Product Features: Sustain Control: Adjusts the amount of sustain and distortion. Tone Control: Provides a range of sounds from high treble to deep bass. Volume Control: Sets the output level. Amp Jack: This is the audio output. Input Jack: This is the audio input. Bypass Footswitch: Toggle between effect and bypass modes. Product Specifications: Circuit: Analog. Bypass: True Bypass. Audio: Mono. Power Supply: 9V battery included (optional 9.6VDC-200mA power adapter not included). Dimensions (in): 4.75 x 4 x 2.25. Current Draw: 4mA. Year Released: 2006. UPC: 683274010496.