Casio PX150BK Black 88-Key Touch Sensitive Privia Digital Piano with Tri-Sensor Scaled Hammer Action with X-Style Bench, Stand, Piano Book and CD and Polishing Cloth Tri-Sensor, Scaled Hammer-Action Keyboard 4 Layer Stereo Piano Ebony and Ivory Feel Keys Hammer Response and Damper Resonance Simulator AiR (Acoustic and intelligent Resonator) provides unmatched realism and detail