ION Audio PIANO APPRENTICE 25-note Lighted Keyboard for iPad, iPod and iPhone 25-note lighted keyboard with touch-sensitive mini-keys Follow the lighted keys and learn how to play piano quickly Free piano teaching app available via iTunes Compatible with-iPhone 3GS, iPhone 4, iPod Touch, 3rd gen iPod Touch, 4th gen iPad 1, iPad 2 Powered by batteries (included) or optional AC adapter