... :varied,23mm diameter *15 mm height or as customer's request size3. Message:voice,music and sound are abailable.4 ... also can emit any colour flashing light!9.Components: PCB, IC, speaker, microphone, LED indicator, batteries, wire harness, switch, more ... , produce and sales. Our products are ranged from electronics toys, promotion gifts, electronics component. For example sound chip, sound box, music ...