Ideal for all skill levels, whether you're just starting out or a seasoned player 88-key, PHA-4, hammer-action keyboard feels and responds like a real piano to ensure maximum expression SuperNATURAL piano sound engine produces rich tones through onboard speakers Twin Piano mode lets students and teachers play side-by-side in identical octave ranges Compact, lightweight body is easily portable from the home to the studio or classroom Headphone output and quiet keyboard action ensure you don't disturb others when practicing or composing Built-in Bluetooth MIDI/USB MIDI interface lets you to connect to your computer, DAW software, and Garageband Piano Partner 2 app lets you choose sounds, tempo, and more, right from your smartphone