Casio AP420 Celviano Digital Piano with Bench, Black New Linear Morphing AiF sound source New 3-sensor hammer action Keyboard with matted Ivory Touch surface New 2 x 20 watt speaker system 16 tones New Linear Morphing AiF sound source New 3-sensor hammer action Keyboard with matted Ivory Touch surface New 2 x 20 watt speaker system 16 tones .