Roll Up Piano - Yamano Digital & Portable 61 Keys Roll-Up Piano Electronic MIDI Keyboard with 16 MIDI Output Channels Design by the INVENTOR YAMANO JAPAN - (YAMANO is the ONLY brand Voted as one of "THE MOST AMAZING INVENTIONS" by the editors of Time Magazine) Features 128 Tone Reportoire, 100 Background Rhythms, 20 Demo Tunes and 16-note Polyphony Built in Speaker with Digital Volume Control; Plug in Jack for headphones or External Speakers or Amplifiers Full Size 61 Standard Keys (C2 - C7) 5 Octave plus 1 Key Keyboard with Standard MIDI Out - 16 Output Channel Design NO AC Adapter or Pedal. Can be operated with 4 AA Batteries (NOT INCLUDED) Roll it up and put it inside the included pouch for easy storage or travel with ease with this 2 lbs piano