The WK-3800 includes 76 Full-Size keys, 32-note Polyphony, Touch Sensitive, General MIDI, USB Port, Sequencer, 894 Tones, 182 Rhythms, DSP/Reverb/Chorus/EQ Digital Effects, SD slot, Sound, Rhythm and Song expansion by Internet download, Backlit LCD, New Advanced ZPI Chip, Larger Internal memory, CD Rom and AD-12 Power Supply Included, Pitch Bend and Modulation Wheels, Line In/Out, FDD.