... :0-270sec 2,40mm speaker and 3xAg10 3.copperpaper 4.open card to listen to sound music greeting card1,recording time ... requirements 2,40mm speaker and 3xAg10 button batteries.3,copperpaper4,open card to listen to sound5,You any custom size of ... .11,Thickness of card: 200gsm,250gsm,300gsm copperpaper .12,When you open sound greeting card and you will listen to vivid pre ...