pre-recording module 1,COB board size:30mmx40mm 2,time:0 ... double-face adhesive paper 4,pull tab switch pre-recording module1,COB board size:30mmx40mm2,time:0-270seconds3,with ... your design chart.9,Pls send your customizable recording sounds and message to us with mp3 or wave file format.10 ... ,Because you can direct tear the doubleface adhesive paper to attach sound module on them ,then when you open ...