WT music box with AG10 battery Applied for greeting cards,books and toys Press it to play music CE.ROHS.FCC.SGS Quick Details ... plasticvolt: 1.5v-4.5vpower: 0.5wBattery: AG10x3pcs 1,sound box used in children's book , toy, education and so on ... can be designed 3,OEM 4,ABS material1,sound box used in children's book.2,Sounds including the ... at the same time,making learning more easier WT music box