Donner OURA™ S100 Home Digital PianoDonner OURA Series Parameter Comparasion Donner OURA S100 VS DDP 80 Donner OURA S100 DDP 80 Keyboard Type Graduated Weighted Keys (Internal Hammer) Fully Weighted Keys Key Action Hammer Action Hammer Action Standard Key Size Standard Standard Tone Source Dream5708+mem3 Dream5704 Polyphony 256 128 Speakers 10W*2 20W*2 Material Synthetic wood + ABS plastic keyboard Synthetic wood + ABS plastic keyboard Cover No cover No cover Tone 15 1 Demonstration 3