M11 Ac Blend

1.The 3-way toggle switch lets you
  choose from J (Jumbo),
  D (Dreadnought) and P(Piezo)
  simulation modes; the BODY
  knob and the TOP knob can further
  shape your tone.
2.True bypass design
3.Large range adjustability to fit
  every electric guitar
  3 simulation modes
4.TOP and BODY knobs for accurate
  tone shaping