FIRST ALERT CO7P01A PLUG-IN CO ALARM W/ 9V B

Carbon Monoxide Plug-In Alarm with 9 V Battery Backup offers simple setup and dependable everyday monitoring, with a backup power source to keep it operating during outages and an alert that lets you know when it's time to replace the unit. It's built for long-lasting performance and supported by a 7-year limited warranty. End of Life Signal provides audible notification alarm needs to be replaced. Easy Installation with flexible wall placement. 9V battery backup helps maintain CO detection during power outages. 7-Year Limited Warranty.