pre-recording module 1,COB board size:30mmx40mm 2,time:0-270seconds 3,with double-face adhesive paper 4, ... ,COB board size:30mmx40mm2,time:0-270seconds3,with double-face adhesive paper back4,pull tab switch5,speaker: ... comply CE &RosH8,Your OEM or ODM sound module also can be made by your design chart. ... tear the doubleface adhesive paper to attach sound module on them ,then when you open greeting card ...