... any soundActivated way: pull-tab switch, buttons, light sensor, vibration sensor, shadow sensor or rocking switch.Main component: speaker, PCB, IC, ... carton, outside cartonCarton size: 56*28*39CMInstruction for use (greeting card for example)Step 1: take out the transparent ... ranged from electronics toys, promotion gifts, electronics component. For example sound chip, sound box, music greeting cards, ...