Custom greeting card sound module Customized sound and music is welcomed Competitive price with best sound quality Suitable The diameter of the speaker can be 30mm,36mm and 40mm.Suitable for gift and toy Message: Voice,music,melody,sound are avaiable Sound formate: MP3,WAV PCB Size: 36mm*25mm customized is avaiable Function: pre-recorded or recordable, or with LED flash (optional)