Battery operated carbon monoxide alarm with mute button to silence any nuisance alarms. Single button also tests alarm functions. The First Alert CO400 Carbon Monoxide Alarm uses an electrochemical carbon monoxide sensor (most accurate technology available). The permanent sensor lasts up to five years. It is powered by a 9V replaceable battery giving you peace of mind even during power outages. The test/silence button both silences the alarm and allows you to test its functionality. The unit monitors and re-alarms if carbon monoxide levels persist sounding a loud 85-decibel horn. No installation is required and the attractive design allows the unit to be placed anywhere you need it. It includes an optional wall mount with no outlet required. An audible and visual low battery signal alerts you to replace the battery. Pull down action chart has convenient guide on what to do if an alarm sounds. 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 111 reviews:
Good for the price - 03/17/2018
Reviewer: Rajeeva Sharma
This was a replacement for an older one with the same model number that had failed after 3 years. It is working fine so far. It uses a 9V battery included while the older one had two AAs. This one has a different spacing for attachment screws requiring the existing ones to be moved.
new carbon monoxide detector - 01/10/2018
Reviewer: Earl McCarthy
This detector replaces older model First Alert over 7 yrs old!
Carbon monoxide detector - 12/29/2017
Reviewer: Jack Willis
It came on time as promised to replace a unit that had seen its better days! Installs easily!
Carbon Monoxide - 11/30/2017
Reviewer: E Grygo
This is a great basic battery operated CO alarm. It has really thorough, easy to understand instructions on proper placement. I Inserted the battery, tested the alarm, and It was easy to install on the wall.
Reviewer: James Schecker
Good Product - 10/23/2017
Reviewer: Mark Silverman
I was replacing the same model First Alert CO2 detector. The position of the mounts in the back had changed so I had to drill an additional hole. Also, the battery door is a little more difficult to open and close. Other than that, it tested fine and is a good value.
Reviewer: Zoya Endzweig
Great price. Great service.
Monoxide Alarm - 09/06/2017
Reviewer: Rana Motgomery
We love the service FAST!
Nice to have - 08/30/2017
Reviewer: Richard Thomas
An essential product for your home. Outside our bedroom is both an old gas water heater and a new gas furnace. It's comforting to have this product there in case either appliance goes bad.
Cheap that works great - 08/28/2017
Reviewer: Tom G
Something that is at a good price that works great.