A compact and powerful modulated octave reverb pedal that features 8 reverb modes with 8 editable presets | Use any TRS expression pedal to take control over the Length, Depth, Rate, Tone, or Mix panel controls | Can operate in two different bypass states: Tails or Full Bypass | The Stretch footswitch doubles the length of the reverb effect while adding a temporary change in pitch | This device takes a standard 9 volt DC power supply with a 2.1mm negative center barrel