Sentinel Hardwire Smoke Detector with 9-Volt Battery Backup, Adapters, Ionization Sensor, Test/Hush Button

Sentinel i12060A is an AC/DC powered, ionization smoke alarm that operates on a 120-Volt power source with 9-Volt battery backup. This alarm 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.