Kidde Fire Sentry Battery-Powered Ionization Smoke Detector

The Fire Sentry i9040 smoke alarm is a battery operated smoke alarm that utilizes ionization sensing technology. The four (4) inch unit is smaller in diameter giving it discreet design with the same quality you would expect in a Kidde manufactured product. The i9040 is powered by a 9V battery, providing continuous protection, even during power outages. This easy to install unit includes a test button to verify the detection electronics are working as intended.Battery Operated (9V Battery Included) - Easy installation and provides continuous protection even during power outages.Test Button - Tests unit's electronic circuitry, horn and battery function.Low Battery Indicator - Low battery warning chirp alerts user to change battery.Discreet Design - Four (4) inch diameter.5" mounting plate for covering paint rings