... or any soundActivated way: pull-tab switch, buttons, light sensor, vibration sensor, shadow sensor or rocking switch.Main component: speaker, PCB, IC, ... card for example)Step 1: take out the transparent sheetStep 2: tear down the yellow paperStep 3: stick on the greeting ... in 1996, more than 4 years experience dealing export business.2. We are a well known manufacturer in electronics field, collecting ...