Yamaha P115B Weighted Action Digital Piano with Keyboard Stand and Piano Bench GHS weighted 88-key action is heavier in the low end and lighter in the high end, just like an acoustic piano. Pianist Styles turn your simple chords into exciting accompaniment. Play a chord and the Pianist Style gives you a full piano accompaniment. The Controller App for iOS devices adds a rich, graphic user interface allowing for quick and easy navigation and configuration The Pure CF Sound Engine faithfully reproduces the tone of a meticulously sampled Yamaha's acclaimed 9' CFIIIS concert grand piano, allowing for incredibly dynamic and expressive playing Bundle includes P115 Piano ,knox z style stand knox piano bench and music stand