The NPK-20 uses NUX's WKJ-03 Triple-Sensor Graded Hammer-Action Weighted Keyboard (with escapement and synthetic ivory and ebony keytops), and has further optimized its key touch curves and sound design. More professional processing has been made for its key touch in terms of downforce, rebound recognition, legato recognition, etc. The sense of escapement and the balance of the black and white keys are also more even. Moreover, the NPK-20 has added a key noise reduction design. Ultimately, it meets all kinds of playing and performance needs, and restores the real touch of a grand acoustic piano.