Product Review
The optional battery backup will allow the guardian alert 911 product to operate during a power outage until the power comes back on, or up to 24 hours, whichever comes first.
Disclaimer: As an Amazon Associate I may earn from qualifying purchases
The optional battery backup will allow the guardian alert 911 product to operate during a power outage until the power comes back on, or up to 24 hours, whichever comes first.
