Electro-Harmonix Octavix Octave Fuzz Pedal Classic late '60's style octaver pedal with vintage octave up and fuzztone effects. Volume, Boost and Octave controls let you dial in the right tone Switchable 9 and 24 volt power rails give a saggy or tight sound True bypass for maximum signal path integrity Period evocative, psychedelic design and blue LED for a vintage vibe EHX9.6DC power supply included. Also runs on 9V battery (not included)