Casio CTK-481 Keyboard with Adapter & Song Books On-screen Keyboard, music staff and finger icons display notes and chords 61 full-size keys; 12-Note polyphonic 2 Built-in Speakers; Lineout/headphone Jack LCD Window (76x42mm) display selections and status of Tone, Rhythm, Song, Volume, Melody Off and Tempo MIDI IN/OUT Jack; 5-part multi-timbral