NAUTILUS is manufactured in Japan to the highest levels of quality. The 88-key model uses the critically acclaimed RH-3 piano keyboard, a four-stage weighted hammer action keybed that provides an extremely realistic piano feel for even the most discerning of players. RH-3 keyboards are gradually weighted, meaning that the lower notes are heavier, and the higher notes lighter for superb playability. NAUTILUS AT features an expertly-tuned sound library that brings exciting aftertouch-controlled effects to the existing programs, meaning you can fully embrace the expressive capabilities of Aftertouch right out of the box.Aftertouch, in combination with initial touch and the DYNAMICS knob (giving instant control over the changes in sound) opens a wide range of musical expression in just one instrument. Combined, these features truly unlock the full potential of nine powerful sound engines, and a vast array of other features on NAUTILUS.