It can be stuck on book as a music or message pat
1)  Push each of 16 active buttons on message pat to play one individual message
2)  Dimension: 220 x 60 x13mm
3)  On-Off switch beside
4)  Voice duration: It will be decided by the customized sound file. As longer as  the Buyer’s need. For example 160s to 660s
5)  Match EN71 and ASTM standard as well as CE request.
6)  Use 2 AAA batteries
7)  Component: plastic case, sound chip, PCB, speaker, sticker and batteries