Sentinel Battery Operated Smoke Detector with Ionization Sensor

i9040 smoke alarm is a battery operated smoke alarm that utilizes ionization sensing technology. The 4 in. 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 9-Volt 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 (9-Volt battery included) easy installation and provides continuous protection even during power outages|Test button tests unit is electronic circuitry, horn and battery function|Low battery indicator low battery warning chirp alerts user to change battery|Discreet design 4 in. diameter|Smoke detector utilizes an ionization sensor to detect fire hazards and sounds an 85 db alarm when a hazard is detected|UL/CSFM reference model i9050