1. Book matchs music or recording accessories, triggering by outside 27 buttons; 2. sound children book is of instructive significance and enhances children's knowledge; 3. Music or voice recording time is designed according to customer's demands and standards; 4. Theme and content on sound book is costomized in demand of client; 5. High- quality acoustic, long time duration; 6. components: An interactive sound module Wipe-off pages Wipe-off marker Full-color illustrations 27 sound keys A built-in speaker And more! Customized messages are quite welcomed!