Product Detail 88-note, GHE (Graded Hammer Effect) weighted-action keyboard 128-note polyphony Dynamic Stereo Sampling - 4 separate layers of stereo samples Key-Off Sample plus Sustain Sample for acoustic piano realism Emulates the soft/half pedaling and damper effects of an acoustic . The "Yamaha P155B Contemporary Piano with Ebony Top Board, Black" is best product for you. We recommended Yamaha P155B Contemporary Piano with Ebony Top Board, Black