Casio Privia PX150BK Digital Piano Keyboard, Complete Home Bundle with Bench,Open -Ear Headphones and Zorro Sounds Piano Polishing Cloth New multi-dimensional AiR sound source (128-note polyphony) New Tri-Sensor Scaled Hammer Action II 18 tones, 60 rehearsal songs Sequencer (MIDI, 1 song x 2 tracks) Layer/Split/Duett function