Battery operated carbon monoxide alarm with mute button to silence any nuisance alarms. Single button also tests alarm functions. Carbon monoxide alarm utilizes electrochemical sensor for increased accuracy. 5-year limited warranty. Carbon Monoxide alarm meets UL standards.
This carbon monoxide alarm is for you if:
● You want basic protection from the threat of carbon monoxide.
Where To Place Carbon Monoxide Alarms: One on every level of the home and one in each sleeping area.
First Alert Carbon Monoxide Alarm CO400
Average Customer Rating Based on 91 reviews:
Easy to install, great reminder beep - 03/13/2017
Reviewer: James Kirven
I had one of these CO sensors for about 5 years. The beep was a reminder to replace it after 5 years. I'm very secure having the First Alert sensor. Battery operated won't fail with a power outage and the battery lasted a long, long time. There is also an alert to change the battery.
Minor replacement installation glitch - 03/09/2017
Reviewer: Ron Chestnut
The mounting screw pattern for exactly the same model changed in the last 5 years. No big deal redrilling holes, but it would have been nice to just put the new one in with no work.
Battery Co alarm - 03/04/2017
Reviewer: jean feick
easy to install
Very Pleased - 02/21/2017
Reviewer: Geraldine Stephens
The First Alert brand is a trusted brand I have been buying for many years. I did try my local hardware stores and they did not have the model alarm I wanted. So I ordered directly from First Alert online and received the correct alarm in few days. Very pleased. Jeri Stephens Mission Viejo, CA
Reviewer: Robert Emmick
Very happy with the Basic Battery CO alarm. Replaced one that was older.
I got what I wanted - 01/27/2017
Reviewer: Jarred OLoughlin
It was back ordered but it was what I wanted and ordered. Easy to install
Fine replacement for older model that was no longer working - 12/28/2016
Reviewer: Robert Lustig
This model is the newer version of the one I purchased a number of years ago. It works just fine. The only criticism I have is that the holes are spaced farther apart for mounting, so I needed to drill new holes - no big deal since the old holes are hidden by the alarm.
First Alert - first choice ! - 09/20/2016
Reviewer: Mike Bubrick
Our firm services carbon monoxide detectors in more than 600 living units managed by a local real estate company. We have 7 years experience with all brands of CO detectors. Our first choice of CO detector is the First Alert CO400. The dependability of the unit, the power behind it 9 volts vs 2 or 3 AA 1.5 volt batteries and the secure installation method all combine to make this model a winner. So far in 2016, we have installed 340 CO-400s and the year isn't finished!
It really works! - 12/26/2015
We have this model in our 2nd floor bedroom which is right above the kitchen. One evening, we used the oven and were having some issues with it heating up. I thought we got it figured out. A little while later, the CO2 alarm went off and wouldn't shut off until we opened all the windows and got fresh air in the house. Needless to say I'm very pleased with this product and I got a new stove too!
Reviewer: Patricia Coleman
easy to install..