The CTK-3500 is the perfect choice for keyboard students of all ages. The piano-shaped keys are touch sensitive, which encourages the correct finger technique for expressive playing. A wealth of 400 sounds and 100 rhythms means you'll always find something to suit your style. This keyboard can also teach you to play any of the 60 songs in its built-in library, which can be expanded via the use of CASIO's Chordana Play App. 61 Touch Sensitive Keys, ideal for keyboard students of all ages.400 Built-in tones, to keep your playing inspired.Dance Music Mode.Chordana App Compatible.Audio Input allows connection to a Media Player.AC or Battery powered.