Yamaha P45B Digital Piano Basic Bundle Package Yamaha P45B 88-Keys Graded Hammer Standard Contemporary Digital Piano keyboard in Black with AMW Stereo Sampling Sound GHS weighted action Portable keyboard is heavier in the low end and lighter in the high end, just like an acoustic piano. Advanced Wave Memory Stereo Sampling recreates natural instrument sound in stereo. 64-note polyphony allows the player to perform moderately dense piano passages, even using heavy sustain pedal, with few or no dropped notes being cut off. With Yamaha slim, lightweight, compact easily portable grand digital piano lets you set up complex sounds for live performance The USB to HOST port allows you to connect and interact with a wide variety of educational, music creation or music entertainment applications on a computer or mobile device.