What is the alarm, what is the role

Alarm is a kind of when meet the set some kind or some kind of abnormal conditions, with sound, light, air pressure and other forms of reminder or warning people to pay attention to, take corresponding measures of electronic products. The role is to warn or prompt.

The vernacular: "Please note that here occurs or may occur your attention to the event, come to deal with or quickly leave here or dangerous, etc.".

With the progress of science and technology, the alarm application field is more and more extensive, often used in system failure, security, transportation, medical rescue, emergency relief, induction detection and other fields.