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Alarm is an electronic product, which reminds or warns us that we should take some action in the form of sound, light and air pressure to prevent or prevent the consequences of an event. Alarm is divided into mechanical alarm and electronic alarm.
With the progress of science and technology, mechanical alarms are increasingly replaced by advanced electronic alarms, which are often used in the fields of system failure, safety precautions, transportation, medical rescue, emergency rescue, induction detection and so on, and are inseparable from social production. Such as door magnetic sensor and gas induction alarm.
The alarm mainly uses the existing telephone network or GSM. The wireless mobile phone GPS network is connected with the owner's phone or mobile phone in a wireless or wired way to realize electronic products with remote anti-theft function, such as infrared detectors, door magnets, smoke detectors, infrared fences and so on.
With the development of domestic security market, the anti-theft device market is becoming mature.
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