Their battery operation means they aren’t impacted by blackouts, to help you trust your hallways and stairwells to stay illuminated and aid a relaxed, orderly evacuation.
Detectors: these are generally critical for https://patch.com/north-carolina/raleigh/classifieds/gigs-services/467764/safeguarding-lives-and-property-all-american-fire-protections-quarter-century-of-excellence