A slim, light and compact design, featuring a 76-key Piano-style keyboard. Improved Grand Piano sound, 64-note Polyphony, recording function, USB to Host connectivity, compatible with Digital Piano Controller app (V1.1), compatible with iOS apps (My Music Recorder, Sound Controller, Visual Performer, Piano Diary, Metronome), compatible with optional UD-BT01 USB wireless Bluetooth MIDI Adaptor.