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120V AC Hardwired Smoke Alarm for Basic Use features:
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The Kidde i12020A is an AC powered, ionization smoke alarm that operates on a 120V power source. 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.