The Kidde KN-COP-IC is an AC wire-in carbon monoxide alarm that protects you and your family from the dangers of carbon monoxide. The digital display allows for continuing monitoring of carbon monoxide levels. Its multiple contractor friendly features ensure easy installation and minimal troubleshooting. This alarm interconnects with up to 24 Kidde devices including smoke alarms, CO alarms and heat alarms on one wiring network. The KN-COP-IC includes a 9V battery back up for continuous protection in case of power failure. It has a 10-year life and 10-year limited warranty. 10-Year Life: “If your CO alarm was manufactured prior to 2013, it does not have a 10 year life. Consult your User Guide for additional details, or contact us for more information." The Kidde KN-COP-IC is an essential device designed to protect you and your family from the dangers of carbon monoxide in your home. The digital display feature allows constant monitoring of carbon monoxide levels and updates every 15 seconds to let you know if levels change. The peak level memory feature displays the highest CO level measured since the last reset. The 9V battery back up provides continuous monitoring of carbon monoxide levels even during a power failure. The KN-COP-IC includes a smart interconnect system. This system 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.