The memory feature allows an Alarm that has previously activated to be easily identified (as the red LED will continue to flash for 24hrs after the event or afterwards when you press the Test button). When the Alarm detects potentially dangerous levels of CO, the red LED flashes and if the CO persists the alarm will sound. The rate of flashing of the red LED indicates the level of CO. The higher the level of CO detected, the sooner the alarm will sound.

Ei3018 Carbon Monoxide Alarm Instructions | Aico

The Ei208 Carbon Monoxide Alarm is supplied with a powered-for-life sealed Lithium battery. It contains a high performance, proven 10 year electrochemical CO sensor to detect the presence of toxic levels of Carbon Monoxide (CO). Each sensor is individually calibrated and tested in Carbon Monoxide gas to ensure accuracy.

u).call(s,"FP_Flight_Details","Flight Details",{name:"mc",hash:{},data:e}))+'\n\t\t\t