FIRST ALERT CANADA 1038871 LED Combination Smoke/CO Alarm and LED Strobe 120 VAC, Wire-in, 3-in-1

photoelectric smoke sensing technology. Electrochemical carbon monoxide sensor. Battery back-up for protection during power outages. Voice alerts tells you the type and location of danger. Interconnected interconnected with other compatible alarms. Emergency notifications notifies you if something is not right in your home (on your phone). Quick, easy installation adapter plug included. No need to rewire. 5 year limited warranty.