FireAngel - Carbon Monoxide Alarm

With electrochemical sensing technology and a clear loud alarm, the FA6813 provides trusted carbon monoxide (CO) detection for your home.
The alarm comes with 2 x AA batteries that can be replaced once you hear the low battery chirp to keep you protected. 

Alarm memory indicates previous activation: With the alarm memory function, a red LED will flash to let you know with a visual indication that there has been a previous CO alarm activation within the last 30 days.