SAME AS CO400A ASIN: B004Y75ZS2
Battery operated, 9V battery included
Mute button, mutes unnecessary alarms. Also tests alarm function with same button
Low battery Signal mute, quiets low battery Signal for up to 8 hours
Electrochemical sensor, most accurate technology available for detecting carbon monoxide* *compared to other common sensing technologies
End of life timer, alarm chirps when it is time to replace it
Care: Vacuum the CO Alarm cover once a month, using the soft brush attachment. Never use water, cleaners, or solvents, since these may damage the unit. Test the CO Alarm again after vacuuming.