Develop the pianist in you with the Dream Cheeky Roll-up Piano that lets you experiment with mixes, instruments, effects, rhythms, and beats. You simply have to unroll this piano and plug into your USB port. It has a four-octave range, 49 membrane keys, and full polyphonic capability that deliver high performance. With 135 astounding built-in sounds, you can play the piano, organs, strings, horns, and woodwind endlessly. This USB piano keyboard allows you to use the existing library of songs provided or record your own. You can carry the 49-key piano keyboard wherever you wish to give a musical performance.