... double-face adhesive paper 4,pull tab switch sound chip1,COB board size:30mmx40mm2,time:0-270seconds3 ... batteries7,comply CE &RosH8,Your OEM or ODM sound module also can be made by your design ... wave file format.10,It is very suitable for your greeting card,postcard,magazine,envelope or other ,Because ... adhesive paper to attach sound module on them ,then when you open greeting card to listen to ...