401 high-quality voices, including pianos, guitars, drums, orchestral instruments and sound effects, onboard lesson function with quiz mode (Yamaha Education Suite) helps beginners learn to play songs, duo mode allows two people to play together on the same instrument by creating two middle C notes, compact, portable design, connect an external audio source to the AUX IN jack to enjoy playing along with your favourite songs, use Master EQ to adjust the sound to your preference, 143 auto accompaniment Styles (with Smart Chord) provide real-time band backing tracks based on the chords you play.