Yamaha DGX640

88-key Graded Hammer Standard (GHS) keyboard with matte black keytops Acoustic, super-expressive Live!, Cool! and Sweet! Voices and DSP included Easy Song Arranger feature and Performance Assistant Technology USB connection for convenient storage and song data playback Optional three pedals unit for expressive effects DGX-640 is Yamaha's most piano like ever, with weighted graded hammer actions, ultra-real feel and more. All the best sounds are available at the push of button and recording virtuoso performances is simple with built-in recorder. The Yamaha Education Suite and USB connectivity add functionality.