First Alert

First Alert CO400 Battery Operated Carbon Monoxide Alarm

$16.95
(4) 4 stars out of 10 reviews 10 reviews
$16.95
$16.95
Free overnigh delivery
FSA and HSA eligible
First Alert CO400 Battery Operated Carbon Monoxide Alarm

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Customer reviews & ratings

4 out of 5stars
(10 reviews)
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Most helpful positive review

5.00 out of 5 stars review
Verified Purchaser
02/26/2020
Great to have and hope it's not needed
Needed one and other one was very old
Linda

Most helpful negative review

1.00 out of 5 stars review
Verified Purchaser
04/14/2020
I received ONE, not a 3-pack as advertised!
Steffany
  • 5.00 out of 5 stars review
    Verified Purchaser
    09/25/2020
    Good product
    This item replaced one I had for 10 years and it only changed slightly. It is on my wall and working fine.
    Creekerken
  • 5.00 out of 5 stars review
    Verified Purchaser
    08/10/2020
    good review
    The carbon monoxide detector came timely and of good quality. The directions were easy to follow and full informational to save and use as needed. I liked that it had a battery with it.
    Stefanie
  • 5.00 out of 5 stars review
    Verified Purchaser
    07/12/2020
    Larry
  • 5.00 out of 5 stars review
    Verified Purchaser
    04/18/2020
    First Alert CO400
    Purchased this to replace my existing one that was 7 years old. They changed the location of the rear mounting holes, but it is great other than that!
    PJatwalmart
  • 1.00 out of 5 stars review
    Verified Purchaser
    04/14/2020
    I received ONE, not a 3-pack as advertised!
    Steffany
  • 4.00 out of 5 stars review
    Verified Purchaser
    04/01/2020
    Easy install
    Easy to install and works well in the test mode.
    Bezier
  • 5.00 out of 5 stars review
    Verified Purchaser
    02/26/2020
    Great to have and hope it's not needed
    Needed one and other one was very old
    Linda
  • 5.00 out of 5 stars review
    Verified Purchaser
    01/22/2020
    Dead after six years
    lasted six years then dead. five chirps says Im over it
    Russell
  • 4.00 out of 5 stars review
    Verified Purchaser
    08/29/2017
    Great purchase!
    Price was fair, it does what I need, I hope. I can't really tell if it is working. I would buy it again!
    Kenneth J
  • 1.00 out of 5 stars review
    Verified Purchaser
    02/15/2016
    Failed Consumer Repeat Purchase Criterion
    I bought this CO400 to replace an older CO400. I could have purchased another UL approved unit for half the price but didn't want to drill new holes. First Alert changed the hole pattern anyway!?@
    AllThumbs
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