Yamaha YPR-7 is a portable piano with 61 touch-sensitive keys that can produce a variety of sounds, including piano, electric piano, harpsichord, and vibes. It has a built-in amplifier and speaker, so you can play it without needing any external equipment. You can also connect it to headphones for private practice. The YPR-7 has a number of features that make it a great choice for beginners and experienced players alike. Its touch-sensitive keys allow you to control the volume and brightness of your sound, just like on an acoustic piano.