88-key weighted hammer action with polyaftertouch (poly pressure), 4 midi outs, multiple zones, wheels and joystick bend and modulation. Closest thing to a Kurzweil Midiboard The screen has been replaced and upgraded to an LCD display so there is no buzzing. Also had the aftertouch modded to make it more responsive. I believe it was a variable resistor so you could change it but you'd have to open it up to do so.