Combination Smoke Carbon Monoxide Alarm Detector Powered by Battery,Smoke Detector Carbon Monoxide Detector Combo with Test Button and LCD Display,Smoke and Carbon Monoxide Alarm for Home

Carbon monoxide detectors/smoke alarm is a 2-in-1 dual fire detector and carbon monoxide detector, it has a a high sensitivity photoelectric sensor to detect smoke and high stability electrochemical co sensor to detect carbon monoxide. Dual sensors also work separately, so once one of them is triggered, this combination smoke carbon monoxide alarm detector will beep with red led flashing. Smoke and carbon monoxide detector is easy to install, you don't need to rewire. Large readable LCD let you know the smoke or co concentration, help you know a real-time air concentration. Led help you know carbon monoxide detector's working status.