pre-recording module 1,COB board size:30mmx40mm 2,time:0-270seconds ... ,with double-face adhesive paper 4,pull tab switch pre-recording module1,COB board size:30mmx40mm2,time:0-270seconds3,with double ... made by your design chart.9,Pls send your customizable recording sounds and message to us with mp3 or wave file ...