Indoor siren help

Replacing the Batteries

Your siren comes pre-installed with two "AA" NiMH batteries that provide 24-hour battery backup in case of power loss. When it's time to replace them, you will be alerted on the O2 Home app/website.

Turn the siren over and unscrew the battery compartment cover. Then, insert the batteries and re-attach the cover.


LED Indications

The LED shows the system status, as follows:

  • Solid Green—unit is AC powered, and backup battery is good.
  • Blinking Green—unit running on backup batteries, no AC power.
  • Off—Backup battery discharged, and no AC power.

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