Kidde Smoke Alarm / CO Alarm, Kitchen Combo, 21010170

Worry Free 10 year sealed Kitchen Combination Photoelectric smoke alarm/Carbon Monoxide alarm features a 10 year sealed in lithium battery that eliminates the need for battery replacement and ends worry over unauthorized battery removal. Self activated when mounted on bracket. Smoke Alarm and CO sensing technologies work together to detect real firs faster and reduce cooking-related nuisance alarms. Alarm memory feature alerts user if the alarm has sounded since the last time the test/reset button was depressed. Smart Hush temporarily silences nuisance alarms for approx. 10 minutes and will not allow Hush Mode unless unit is in alarm mode.