Features . Piano is flexible so when you re done playing.. Portable - take it with you anywhere even when you go outdoors. Can be powered by batteries OR USB cord included so you can play anytime anywhere. Features multiple keyboard tones and demo songs record playback echo sustain built-in speaker with volume control and audio output. 49 standard keys allows you to play tons of music without taking up the space of a large piano or keyboard. Perfect for everyone from beginner to master children to adults - rock out then roll it up.