New Graded Hammer action with Synthetic Ivory Keytops is weighted to match the resistance of hammers in a grand piano * PureCF Sound Engine starts with a meticulous recording of Yamaha"s acclaimed concert grand piano * 128-note polyphony provides enough horsepower for a dropout-free performances even while layering two Voices and playing two-handed, sustained chords with heavy pedaling * 50 classic piano songs are provided in the built-in song memory and also as a music book, "50 Greats for the Piano." Learn how to play these pieces at your own pace either one hand at a time or at a reduced tempo. * 20 Watt amplifier provides enough sound to fill the largest of rooms in a typical household.