Yamaha P45B 88 Weighted Keys Graded Hammer Standard Contemporary Digital Piano Keyboard in Black with AMW Stereo Sampling Sound with&nbsp;Yamaha PKBB1 Keyboard Bench And Samson Open-Ear Headphone Yamaha P45B 88-Keys Graded Hammer Standard Contemporary Digital Piano keyboard in Black with AMW Stereo Sampling Sound. Yamaha p45 slim,lightweight, compact easily portable grand 88 keys weighted action digital piano keyboard lets you set up complex sounds for live performance. GHS weighted action Portable keyboard is heavier in the low end and lighter in the high end, just like an acoustic piano. yamaha digital piano 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. 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.