2,40mm diameter speaker
3,3xAg10 button batteries
4,slider switch or press button
5,Double-face adhesive paper (when you tear the paper and you can direct sound chip to greeting card.)
6,With custom sound
8,When you open card sound will play and close card sound stops.
9,clear sound quality
10,Comply CE and ROSH .
11,OEM or ODM will be welcomed.
12,Sound module is very suitable for Greeting card,Postcard,Newspaper,Magazine,gift card,Christmas card or others.