voice chip 1,COB board size: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 ... ,It is very suitable for your greeting card,postcard,magazine,envelope or other ,Because you can direct tear the doubleface adhesive ...