Electro-Harmonix HOG2 Electric Guitar Foot Controller Sophisticated new algorithms to improve the quality of the ten generated octaves and harmonics as well as the Freeze function; HOG2 sold separately Receives power from the HOG2 Stores presets in your HOG2, not the Foot Controller Save and recall up to 100 preset programs with the optional foot controller (versus six with the original HOG) Controllable harmonic intervals: -2 octaves, -1 octave, original note, +5th, +1 octave, +1 octave +5th, +2 octaves, +2 octaves +3rd, +3 octaves, + 4 octaves