Kidde Wire-In AC/DC CO Alarm

Unit helps warn of dangerous carbon monoxide levels and is interconnectable with other Kidde devices, such as smoke alarms and heat detectors. Its 9V battery back-up also provides continuous monitoring of carbon monoxide levels. Alarm includes a Smart Interconnect system, which enables the unit to alarm in a carbon monoxide pattern and sound a different pattern when interconnected to a Kidde smoke alarm that is in alarm mode. 5-year warranty.