Joke Collection Website - Public benefit messages - Do you have a distress alarm for people who have been mistakenly locked in the cold storage?
Do you have a distress alarm for people who have been mistakenly locked in the cold storage?
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There is that kind of emergency one-button alarm, the schematic diagram is as follows.
Press the key on any key box, and all audible and visual alarm will start to work. Press the key on any key box again, and all audible and visual alarm will stop working. ? Press the 1 key on the remote control to start all audible and visual alarms, and press the 2 key on the remote control to stop all audible and visual alarms. ? The key box and the remote control operate synchronously. ?
In this way, if someone is locked in the cold storage, he presses the button to call the police, and people outside can see it.
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