Warning system for warning residents about natural disaster, has group of warning devices temporarily coupled with alarm device, where one of warning devices is activated by alarm activation unit, so that alarm is produced to provide alert

摘要

The system has a group of warning devices temporarily coupled with an alarm device equipped with a control unit. One of the warning devices from the group is activated by an alarm activation unit, so that an alarm is produced to provide alert. The alarm device includes a speaker and a microphone, where the alarm device is designed to activate the alarm activation unit by open telecommunications connection with any of the other devices in the group, and the alarm is offered through the speaker.