Specification Power: DC 5V Speakers:Built-in high quality speaker system Battery: 4 AA dry batteries(enables 10-12 hours playing), not included Piano Tones: 10 options Demo Songs: 8 options Features 49-Note Keyboard Allows Children to Practice Piano Anytime, Anywhere with Easy Color-Coded Notes, Built-In Speaker & Adjustable Tones Soft, Flexible Keyboard Rolls Up in Seconds for Discreet Storage & Travel Convenience Nonslip Bottom Prevents Movement on the Floor as Boys & Girls Practice, Great for School, Music Class, Play Date or Vacation More Than a Toy, replicates the Sound & Feel of a ‘True’ Piano, Teaching Kids How to Read, Play & Practice Music as Young as Preschool Choose from [10] Unique Instrument Sounds & [8] Demo-Songs with Play-Along Function Includes High Quality Built-In Speaker & Ports for External Mic/Speaker, Volume Wheel & ‘Record’ Option to Play Back Notes Device Runs on [4] AA Batteries So Kids Can Tickle the Ivories Everywhere They Go! Includes DC 5V USB Power Cable for Unlimited Play & Mesh Carrying Case | Perfect Gift for Music-Loving Toddler, Kindergartener, Etc. The 1K1N mode special teaching function. This function sets all the keys to one tone, allowing kids to just tap keys to the rhythm to play beautiful melodies.