With the Yamaha Arius YDP-143 digital piano, you get the feeling that you're playing an acoustic piano. The keys with weighted hammer mechanism give just as easily as those of a grand piano or an upright piano. This allows you to easily distinguish between soft and harder keystrokes, and to put more feeling into your piano playing. With the included sustain, sostenuto, and soft control pedals, you can lengthen and accentuate the tones with your feet. You press the sustain pedal with your foot to lengthen the piano tones. This gives you more time to find a new hand position. With the soft control pedal, you make the keystrokes sound softer. You can mount the piano at playing height with the included underframe.Note: you can find the included AC adapter at the side of the box, packed in styrofoam.