61 full-size keys, 12-note polyphonic, 100 Song Bank tunes, 100 distinctive tones, 100 electrifying rhythms. Musical Information System with LCD Backlight. On-screen music staff, and finger icons display notes & chords played, and metronome icon indicates the beat. 2 built-in stereo speakers, 5-channel multi-timbre MIDI. Operates on D batteries or optional AD-5 AC.