Yamaha P115 88-Key Weighted Action Digital Piano with Sustain Pedal, Black GHS weighted 88-key action is heavier in the low end and lighter in the high end, just like an acoustic piano. Amplifiers 7 W x 2.The Pure CF Sound Engine faithfully reproduces the tone of a meticulously sampled Yamaha's acclaimed 9' CFIIIS concert grand 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. Includes PA150 Power Supply and a Sustain Pedal