Yamaha YDPS55 Arius Series Slim-Body Digital Piano With Stand And Bench (Black) - 88 KeysThe YDP S55 is a slim, 88 key model of the ARIUS digital piano featuring a weighted keyboard. With Yamaha's CFX concert grand piano sound as a built in Voice, experience a luxuriously expressive playing feel with the GH3 keyboard. Includes newly equipped ear friendly functions, and compatibility with Yamaha's Smart Pianist app. Lid becomes flat tabletop when closed. The luxurious tone and expressive ease of playing stays true to the basics of a real