Chemicals 1. switches. Open-close
2. pri circuit circuit, Mike. Power amp
4. push button change the conversation 5.Adapter 12 v. DC
6. power cord connected to the second device
8 loudspeakers 7. light bulb. LED control circuit.
1
2
a รอินฟราเรด contract cycle 3. infrared receiver liver
siren speaker 4.
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