The siren has a sealed battery that powers the device. The battery charges from the Fibra line and is used both for indication and for notifying about alarms and events.
If the Fibra line is damaged or there’s an emergency power shortage, the backup battery will provide the siren with power to indicate and alert alarms and events.
In the Ajax apps, you can set the siren to activate an alarm if the Fibra line is damaged.
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