... sound chip 1,COB board size:30mmx40mm 2,time:0-270seconds 3,with double-face adhesive paper 4,pull tab switch sound ... ,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 ... direct tear the doubleface adhesive paper to attach sound module on them ,then when you open greeting ...