First Alert Carbon Monoxide Alarm, 2Aa Batteries

Basic 9V Battery Operated Carbon Monoxide Alarm Meets Most Codes, Both State And Local, For Carbon Monoxide Alarms. Electrochemical Carbon Monoxide Sensor - The Most Accurate Sensor Available As Compared To Other Sensing Technologies End Of Life Signal Provides Audible Notification Alarms Needs To Be Replaced Single Button Test/Silence Two Silence Features - Can Silence The Low-Battery Chirp For Up To Eight Hours Or Temporarily Silence An Unwanted Nuisance Alarm 7-Years Limited Warranty

First Alert Carbon Monoxide Alarm, 2Aa Batteries