fall detection system
It comes with a 10 year warranty. The First Alert operates with AA batteries and should be checked twice a year for battery life. Both Ionized and Photo Electric smoke sensorsDetects smoke from both smoldering and flaming firesLoud alarm to rapid responseSensors that detect non fires to reduce false alarms10 Year limited warranty– Anthony Dawson View on Amazon See also onAmazon. co. caBest Overall Smoke Detector First Alert SA320CN Dual Sensor 4. 9/5 Product RatingThe Kidde KN COSM B Battery Operated Combination Monoxide detector is a combination smoke and carbon monoxide detector.