RD-88EX Stage Piano - ExpandedProfessional RD stage piano with expanded sounds, including the SuperNATURAL Acoustic Piano 3 Expansion Acclaimed SuperNATURAL pianos and electric pianos ZEN Core engine with over 3000 additional sounds, including organs, synths, strings, brass, and more World class playability with the 88 note PHA 4 keyboard with hammer action and Ivory Feel Room filling onboard stereo speaker system Convenient built in rhythms for jamming and performance USB audio