The Yamaha YDP-105 is an 88-key, full-size digital piano from the ARIUS series, featuring a weighted keyboard that provides a rich playing feel. It is compatible with Yamaha's Smart Pianist app, offering intuitive operation and score display. The piano produces a perfectly balanced sound throughout its range, with sampled instrument sounds like the Yamaha grand piano delivered through newly designed speakers with rich harmonic detail. The GHS keyboard reproduces the touch of an acoustic piano, from the natural heavy feel in the lower register to a lighter touch in the upper octaves, providing grand piano-like response and feel. The piano is like new, I bought it at a good price.