... 4. OEM 5. 32 pages per book Preschool Read Book This set of audio books including: ... for example , Mathematic , English learning, Classic Fairy Tales , Chinese learning , game books,etc,. If customers need ... Volume control5. MP3 player6. Record7. Select songs8. Page-turning9. Li battery/AAA Battery10. Listening with earphone ... play by the pen.3. Every page of the OID book has printed a record icon, ...