... sound quality RoHS, CE, FCC, EN-71 Mini waterproof music chip with customized design, available for children's gifts and toys. Two ... capacity button cells, long life time.Main components:PCB, Speaker, IC, Microphone, AG10 battery, back sticker, wires, push button or pull ... -tab switch, etc.Can be made with customized music as background sound, any design is available. OEM ...