You'll feel as if you're playing an acoustic piano with the Casio PX-770. This digital piano's 88 keys have a weighted hammer mechanism. This lets you put more feeling into your piano playing. Select 1 of 19 realistic piano sounds. This includes the sounds of concert grand pianos, electric pianos, strings, and organs. You can adjust the sounds to your liking. Would you like to simulate the acoustics of a well-known concert hall for extra realistic sound reproduction? If so, switch on reverberation from the Hall Simulator. The piano has 2 speakers on board, allowing you to directly listen to your piano play. If you want to practice in silence, connect a pair of headphones to 1 of the 2 headphone jacks.