BRK Electronics First Alert CO5120BN 120V AC/DC Hardwired with 9V Battery Backup Electrochemical Carbon Monoxide (CO) Alarm

Hardwired carbon monoxide alarm with battery back-up meets codes where CO alarms are required for new construction. Electrochemical Carbon Monoxide Sensor - the most accurate sensor available as compared to other sensing technologies Single button test/silence 9V Alkaline Battery Backup Latching alarm indicator - remembers which unit initiated an alarm Two silence features - can silence the low-battery chirp for up to eight hours or temporarily silence an unwanted nuisance alarm Intelligent Sensing TechnologyTM ? helps reduce the number of nuisance alarms Dust Cover Easy Installation/Maintenance - Preferred features include a large opening in the mounting bracket for easy access to wiring. Keyhole slots in the mounting bracket eliminate the need to remove the electrical box screws for installation. A battery pull tab keeps the battery fresh until the home is occupied. Battery installation and removal can occur while the unit is mount