1. Function: push or press the button , it will play the sound. different button,the sound will be different.
  For children's educational books, enrich children's knowledge and enhance their interesting of study
  For language studying
  For music teaching and learning, entertainments
  For the blind people learning
2. Material: ABS plastic
3. Size: customized
4. Sounds: It accepts custom musics, that is a key on the board, which you press it will play the custom demon, and press again it will change to piano sound
5. Sound duration: customized
6. Button: 23keys:14white keys,9black keys
7. Sound format: MP3/WAV