Product information "Z.VEX Jonny Octave Handpaint"
This “clean” analog octave-up pedal will raise your single-note solos one or two octaves up when you play through your neck pickup at the 12th fret. Jonny’s “engine” contains four germanium diodes and a transformer in each channel, with four internal gain trimmers allowing adjustment for your playing style.
Control options: Volume Octave 1, Volume Octave 2
Power operation: 9vDC battery or external power supply (optional)