Powered by Casio's cutting-edge AiR sound engine Stunning piano sounds with damper and string resonance, 192-note polyphony, and a total of 18 built-in Tones Beautifully polished top-panel design with illuminated touch-sensor controls Designed to work with the free Chordana Play for Piano iOS/Android app Powerful stereo speaker system plus 2 headphone and 2x 1/4-inch outputs Class-compliant USB port with no drivers or installation needed 88-note Smart Scaled Hammer Action Keyboard with simulated ebony/ivory key textures Bluetooth audio via WU-BT10 USB adapter for playing along with your favorite songs Duet mode splits the keys into two equal pitch ranges Slim design that weighs less than 25 pounds Optional 6 AA battery power (AC adapter included) Includes CS68 stand