Plug-In CO Alarm
Plug-In CO Alarm
Hero image 0 of Plug-In CO Alarm, 0 of 4
Overall pick
First Alert

Plug-In CO Alarm

4.5 stars out of 158 reviews
(4.5)|
158 ratings

Key item features

Plug-In Carbon Monoxide Alarm with Battery Backup
Current price is $23.99
Price when purchased online
  • Free 90-day returns
Walmart Protection Plan by Allstate

(Only one option can be selected at a time)

How do you want your item?

Try 30 days of Free Shipping with Walmart+! Choose plan at checkout.
How do you want your item?
Columbus, 43215
Arrives by Tue, Mar 10
Sold and shipped by Walmart.com
Free 90-day returns
This item is gift eligible
walmart plus

Get free delivery, shipping and more*

*Restrictions apply

Continue your search on Walmart

About this item

Product details

Specifications

Warranty

Warnings

Customer ratings & reviews

4.5 out of 5 stars
stars158 ratings66 reviews
How item rating is calculated
  1. 5 stars77% (122)
  2. 4 stars9% (15)
  3. 3 stars4% (6)
  4. 2 stars3% (5)
  5. 1 star6% (10)

Reviews summary

Pros
  • : Offers good value at this cost.
  • : Allows for convenient power connection without batteries.
Generated by AI

Customer photos

Filtered and sorted results would be available on the new 'Customer ratings & reviews' page.
Sort by |

Showing 1-3 of 66 reviews

Feb 12, 2026
Kathy
Top Reviewer
Item details
Size: 8.50" x 6.75" x 2.25"
5 out of 5 stars review

Verified Purchase

Replace previous

I rent so don't know when this was installed. I've liven here 3 months short of 7 years and just now replacing it. It is the exact same one it replaces. Extremely easy to install. Was impossible to miss when the unit told me it was expired. 3 short beeps then increasing to 5 short beeps. Unplugged it and took out battery until I replaced it within two days. It is plugged in close to my newly installed brand new furnace and air conditioning unit.

Helpful?3X65B9WVB13R991729050
Feb 1, 2026
JIM
Item details
Size: 8.50" x 6.75" x 2.25"
5 out of 5 stars review

Verified Purchase

Great CO Detector (I hope)

I like that these are plug-in as primary source of operation. They also have a 9v battery back-up, w/ the battery included. I decided to buy a "trusted" brand instead of another unknown brand. My previous brand was Kidde, which also worked well, although they never alarmed the entire 7 years that I owned them. Hopefully, these work. Not sure how one can be tested. Maybe by burning paper?

Helpful?3X65B9WVB13R991729050
Nov 9, 2025
Karen
Item details
Size: 8.50" x 6.75" x 2.25"
5 out of 5 stars review

Verified Purchase

This is a replacement for exact same item that was purchased 10 years ago!!!Great product….I specifically like the battery backup….when the device has reached its maximum use the device beeps…letting you know you need another!…there may be cheaper ones…but for the longevity and peace of mind…I'll always purchase this brand!!!

Helpful?3X65B9WVB13R991729050