This is a 37-key folding electronic (battery-powered) piano book that allows you to play the piano normally and has a 50-song melody playback function. The keyboard is foldable, making it very convenient. - Product Name: Famous Songs Piano Picture Book - Type: Electronic Piano - Number of Keys: 37 keys - Included: Original box, sheet music, batteries are included but it is a used item. - Functions: Melody playback, tone change List price: 4980 yen (excluding tax) My child received this as a new gift from their grandmother and loved using it. There are signs of use on the box and the corners of the sheet music. I am selling it because my child stopped using it after I bought a piano. How about it for children who are interested in the piano? Please purchase with the understanding that this is a used item.