Price: $84.99 - $16.49
(as of Dec 03, 2024 20:12:14 UTC - Details)

The First Alert CO400 carbon monoxide alarm uses an electrochemical sensor the most accurate technology available. The permanent sensor lasts up to 5 years. It is powered by a 9V replaceable battery giving you peace of mind even during power outages. The test/silence button silences the alarm and allows you to test its functionality. The unit monitors and re alarms if carbon monoxide level 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 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. Ul listed.
Keep your family safe with this easy to use, battery operated carbon monoxide alarm; Battery powered alarms provide continuous monitoring of CO levels, even if there's a power failure
Features an advanced electrochemical carbon monoxide sensor that accurately detects carbon monoxide levels, no matter where the detector is placed in the room.The alarm sequence should last 5-6 seconds. If it does not alarm, make sure fresh batteries are correctly installed, and test it again. If the unit still does not alarm, replace it immediately
A loud 85 decibel alarm sounds when CO levels reach dangerous , Battery Replaceable - Yes
To ensure complete protection make sure to place one on each level of your home and in each bedroom
5-year limited warranty; Equipped with end of life signal chirp, so you know when it’s time to replace the unit for safety
All first alert CO alarms are rigorously tested to meet UL standards
First Alert has been the most trusted brand in home safety since launching the first residential smoke alarm in 1958 (Based on a First Alert Brand Trust Survey in February 2018)
Reviewer: Gabe Kasak
Rating: 5.0 out of 5 stars
Title: Easy to operate and install
Review: This CO2 monitor is super easy to setup, affordable, and a reliable brand. Overall, it is a product that is super easy and functional to use. It has a solid alarm volume and gives me peace of mind for my garage space where I am regularly pumping my ventless natural gas heater.

Reviewer: Froggy
Rating: 5.0 out of 5 stars
Title: Perfect Replacement for our prior Detector
Review: Our prior detector did not have a battery to replace so after several years it started to chirp and we had to replace it. This one operates with a battery. It is the same brand and shape as our old one so it was easy to just clip it into the existing ceiling bracket. Time will tell, but so far it works great.

Reviewer: Alyssa
Rating: 5.0 out of 5 stars
Title: Works Great
Review: Great value, works great. Our apartment one died so we quickly replaced it and this works great.

Reviewer: Gina B
Rating: 4.0 out of 5 stars
Title: Very easy to put up but hard to open for battery
Review: I had this in my home when I moved in about 71/2 yrs ago. Had to move it to another location in a hall. I put up anchors with screws & glad this replacement was exactly the same. Only problem is I always have to open the battery casing with a screwdriver.. my last one eventually broke on the one side. But battery fit well & works. Guess it lasted a good while though.

Reviewer: Joseph Ciccarelli
Rating: 5.0 out of 5 stars
Title: Great
Review: I ordered the same kind I had. It lasted the full time it was supposed to and was very easy to install were the old one was

Reviewer: roy louviere
Rating: 5.0 out of 5 stars
Title: Safety item.
Review: A very good product and a good price. Use as a safety feature in my home.

Reviewer: Roma Mugar
Rating: 5.0 out of 5 stars
Title: Very nice
Review: Always take a sharpie and mark the date you put it up inside. They only last about 5 years.

Reviewer: Ozzie T Day
Rating: 5.0 out of 5 stars
Title: Great price
Review: Best price I could find for quality detector.Thanks for giving me a peace of mind for daughter running her generator during emergencies. With my grandbaby 😇

Reviewer: Amazon Customer
Rating: 5.0 out of 5 stars
Title:
Review: I purchased this alarm to install in the upstairs hallway between bedrooms. It was very easy to install and works perfectly and provides the added security I required. I was surprised and happy at how quickly the parcel arrived!

Reviewer: Corey S
Rating: 5.0 out of 5 stars
Title:
Review: Straight forward, and easy to install. Affordable too, everyone should have one.

Reviewer: roger skinner
Rating: 5.0 out of 5 stars
Title:
Review: This unit is very similar to the one we had for over 15 years. CO2 is a danger & we now feel safe again with the new alarm in place. The unit is just a simple plug in, but we did have to read up on where to put it. Placing it correctly is important so study up & get it right.

Reviewer: Chuck
Rating: 5.0 out of 5 stars
Title:
Review: Quickly mounted to the wall and put batteries in. Tested. Made beep noises that split eardrums. Due to the battery nature of it it can mount anywhere close to the ground to detect CO quickly.I wont truly know if it works, and I hope I never need to, but appears solid.

Reviewer: Riza Gee Why
Rating: 5.0 out of 5 stars
Title:
Review: Haven’t used it yet, but for the price it’s a no brainer. Carbon monoxide is a life threatening hazard and buying one or 2 of these carbon monoxide detectors is an essential for any household. I like that this is battery operated and can be placed anywhere.