I9040 FIRE SENTRY SMOKE ALARM

This smoke alarm provides an early warning signal in the event of a fire. It operates on a 9V battery that provides continuous protection even during a power outage. Installation is easy, no wiring required. This unit is UL Listed and includes a 3 year limited warranty. Uses ionization sensing technology. Ionization sensing alarms may detect invisible fire particles (associated with flaming fires) sooner than photoelectric alarms. Photoelectric sensing alarms may detect visible particles (associated with smoldering fires) sooner than ionization alarms.