Yamaha - PEDAL PIANO LP-7A:
The optional pedal unit for DGX-640/650 gives you virtually the same level of expressive control as that of actual acoustic grand pianos, including Half Damper effect, with more realistic control over the sustained sound.
• Damper, Soft and Sostenuto pedals
• Half Damper effect for expressive control over sustained sound
• Perfect for piano players and music students
• Allows the performer to add more refined musical expressiveness
• Attaches to DGX-640/650