Only compatible with the G20 head. Take control of the high gain amp head in lunchbox format and with integrated Two-note Torpedo technology, the Revv G20. Change channels and aggression mode, activate the Two notes reverb or the Wide selector, recall your favorite settings. Of course, the G20 head provides MIDI control of channels, the Wide switch, Aggression modes, Two notes settings and more, so you don't need this pedalboard if you already have a MIDI control system. .