61 Keys Roll Up Piano (Standard Piano Key 5 Octave + 1 Key), 128 Tones, 128 Rhythms, 40 Demo Songs * USB Out and MIDI Out Dual Interface Brand New Design; Much easier than ever to connect to your computers * Built-in Record & Play Back function - Make your own music and play back instantly. * Built in Speaker with Volume Control Plug in Jack for Headphones; Plug in Jack for External Speakers or Amplifiers * USB Cable and AC Adapter are INCLUDED; Can also be operated with 4 AA Batteries