MXR M307 Layers Trigger Sustain Octave Electric Guitar Effects PedalWelcome, you are looking at a great piece. This is the MXR M307 Layers Effect Pedal. The MXR Layers Pedal blooms with rich, organic sustain that imbues every strum and pluck with resonance and depth pull off chord voicings you never thought possible, compose transcendent melodies, orchestrate harmonic ensembles, create lively stereo pads, and more all from a standard MXR housing. This pedal requires a 9 volt (300mA) center negative power supply and