http://www.astsoundchip.com/waterproof-sound-module/4244192.html
Product Description
1. Pre-recording waterproof sound module
2. It can be Used by many promotional products, such as Children Clothes, Postcard, Greeting Card, Toys etc.
3. PCB and size Can be designed according to your requirement
4.40mm plastic speaker with 3pcs button ceels
Waterproof Sound Chip, Waterproof Voice Module