... descriptions of Piano Sound Book 1. Application in education book, kids book, story book, learning book, piano book, English book.2. Function: when ... available: AA, AAA, AG1310. Battery life: plays message or music more than 500 times11. OEM item available: ... , Poland, Switzerland and so on14. Book size: customized15. Book page: 3-10pages16. Book design: artwork availablePacking detailsNet weight: 100g ...