(OLD MODEL) Casio CAS PX150 BK 88-Key Touch Sensitive Privia Digital Piano with Tri-Sensor Scaled Hammer Action Keyboard: 88 keys, weighted scaled hammer action Sound Source: AiR (Acoustic & intelligent Resonator) Polyphony (maximum): 128 Tones: 18 Built-in tones, Duet Mode, Layer, Split, Octave Shift Simulator: Hammer Response, Damper Resonance, String Resonance, Lid Simulator