Kidde 21032311 Smoke and Carbon Monoxide Detector, 70 to 400 ppm, 4 to 240 min Response, 85 dB, Alarm: Audible, Visual, Bracket

This hardwired smoke and carbon monoxide alarm, interconnectable with AA battery backup, model 900-CUAR-V-CA, helps protect you and your family from two hazards fire and dangerous carbon monoxide (CO) in one unit. This smoke and carbon monoxide alarm combo features self-testing components that are always checking to make sure the alarm is on and working. What's more, the included mounting bracket makes installation quick and easy. This carbon monoxide and smoke alarm is capable of being hardwired to other select Kidde alarms, to provide whole-home alarm activation. This setup allows interconnected Kidde alarms to sound in unison, helping to ensure that everyone in the house is alerted. This photoelectric smoke alarm can provide better detection of larger, visible fire particles (the kinds associated with slow smoldering fires). Fire safety experts advise using both photoelectric smoke alarms, like this one, and ionization smoke alarms which may be better at detecting small, less visible fire particles (those that emit from fast-flaming fires). Install both throughout your home for optimal smoke and fire detection. Fire: The red LED will flash and be accompanied by three long alarm beeps. The alarm will repeat this pattern until the unit is reset or smoke is eliminated. Carbon Monoxide: The red LED will flash, and four short alarm beeps will sound. This continues until the smoke and carbon monoxide alarm is reset or the CO is eliminated. Low Battery: One chirp and the LED will flash amber. This pattern will continue every minute for the first hour. After the first hour, the red LED will flash once every minute accompanied by the chirp sound. Alarm Memory: One chirp and the LED will flash red. This pattern will continue every minute for the first hour. After the first hour, the red LED will flash once every minute accompanied by the chirp sound.