61 keys, standard piano key 5 Octave +1 key.Foldable and can be hand-carried and play it anytime and anywhere, also be rolled up for easy storage in you hand bag or carrying case.Music toy for both adults and children, especially suitable for children to develop an interest in music.Compatible with Cakewalk, Sonar, Cubase, Nuendo, etc, major sequencer software and VST / VSTi.