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.”