... 3xAg10 button batteries.3,copperpaper4,open card to listen to sound5,You any custom size of card will be welcomed .Often it is ... .9,Complay CEand RoSH certification.10,The surface of greeting card with matt finish ,glossing finish,lamination or others.11,Thickness ... of card: 200gsm,250gsm,300gsm copperpaper .12,When you open sound greeting ...