... size:2.8*1.9cm 2pcs AG3 battery,buzzer,1 led light Suit for greeting card and gift box. Melody module ... music moduleComposition PCB board,ic chip,2pcs battery,27mm buzzer,led light,sticker,slide tongue switch Function when stick it into ... ,the music will send out and light wil flash Music file Melody file in wav./mp3 format OEM The pcb ... by air.Welcome contact us if you are interested in this product!