... :30mmx40mm 2,time:0-270seconds 3,with double-face adhesive paper 4,pull tab switch voice chip1,COB board size:30mmx40mm2 ... ,time:0-270seconds3,with double-face adhesive paper back4,pull tab switch5,speaker:29mm,38mm,40mm or others ... your greeting card,postcard,magazine,envelope or other ,Because you can direct tear the doubleface adhesive paper to attach sound module on ...