1. One mold for different quantity of pushing buttons, such as 10 button, 30 buttons, 43 buttons and etc..
2. Large size meets your demand of bigger size sound book, which looks more expensive and high-end.
3. 3PCS*AAA batteries accept a much longer music duration than 2pcs*AAA;
4. Speaker size of Dia 40mm makes the sound louder and clear for baby to hear;
5. This is a electronic part with pre-recorded sound used for baby’s board book to help baby with their early education.
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