At a Glance
Plug-in
Battery Back-Up
Analog

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First Alert Plug in Carbon Monoxide Detector 2 -Pack

Name: First Alert Plug in Carbon Monoxide Detector 2 -Pack
Brand: First Alert
SKU: 1000992028
Rating: 4.8 (43 reviews)

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4.8

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The First Alert CO605 carbon monoxide alarm uses an electrochemical sensor the most accurate technology available. The permanent sensor lasts up to 5 years. This carbon monoxide alarm plugs into any standard electrical socket and monitors your space for elevated carbon monoxide levels. 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. This CO detector also features a battery backup that allows for continuous monitoring, even in the event of a power failure. The simple, user friendly design makes this CO detector easy to setup and operate, and it features an end-of-life warning that lets you know when it is time to replace the unit.

Plug-in CO alarm works with any standard outlet and has a battery backup for continuous monitoring during a power failure
Advanced electrochemical sensor detects carbon monoxide levels no matter where the detector is installed
A loud 85-decibel alarm sounds when CO levels reach dangerous levels
CO alarms should be placed on every level and in every bedroom of the home
7-Year limited warranty
Tested to meet UL standards

General
Package Contents	2 Alarm, 2 9 volt battery, manual	Power Source	Plug-in
Package Quantity	2	Series Name	CO605
Battery Type	9-volt	Color/Finish Family	White
Display Type	Analog

Dimensions
Height (Inches)	5	Width (Inches)	1.38
Length (Inches)	3.4

Features
Interconnection	No	Voltage (Volts)	120
Hub Required	No	Battery Back-Up	Yes
Propane Detector	No	Battery Included	Yes
Voice Assistant	No	10-Year Battery	No
Sealed Battery	No	Peak Level History	No
Natural Gas Detector	No	Voice Alert	No
Carbon Monoxide Detector	Yes

Compatibility
Works with Apple HomeKit	No	App Compatibility	No
Works with iOS	No	Bluetooth Compatibility	No
Wi-Fi Compatibility	No	Smart Compatible	No

Certifications
CA Residents: Prop 65 Warning(s)	No	Safety Listing	UL safety listing

Warranty
Warranty	7-year limited

Miscellaneous
UNSPSC	46191500

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Review

4.8 out of 5

43 Reviews

2 Star

1 Star

100% Recommend this product

Ratings may include incentivized customer reviews.

43 Customer Reviews

Sort By

Reliability is most important!

Would Recommend

My family is safe because of the reliable sensor technology. I would not trust any other device.

ChVSOctober 3, 2026
Verified PurchaserIncentivized

Was this Review Helpful ?

Works great, with some small gripes

Would Recommend

Product works great. It shipped with one faulty battery though. They are a bit bulkier than I'd wish too.

abes26September 30, 2026
Verified PurchaserIncentivized

Was this Review Helpful ?

Detector

Would Recommend

Great ..no negativity here

CgbbSeptember 25, 2026
From Plug in Carbon Monoxide Detector Verified Purchaser

Was this Review Helpful ?

A Possible life saver

Would Recommend

I purchased this carbon dioxide detector for when I travel. I use it at hotels and Airbnbs.

JohnSeptember 21, 2026
From Plug in Carbon Monoxide Detector Verified Purchaser

Was this Review Helpful ?

Easy to set up

Would Recommend

Battery cover was a little difficult to remove but overall the product is working correctly!

Bob27September 21, 2026
Verified PurchaserIncentivized

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Good price

We needed new carbon monoxide detectors and these were a good price.

Just KatSeptember 20, 2026
From Plug in Carbon Monoxide Detector Verified Purchaser

Was this Review Helpful ?

Plug in CO Detectors w/Battery Back up

Would Recommend

My go to brand of detector for AC Plug in. Simple to use, dependable and affordable.

LorenzoSeptember 19, 2026
Verified PurchaserIncentivized

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First Alert CO Detector

These are great. We put them in rental units whenever needed.

PropmanSeptember 18, 2026
Verified PurchaserIncentivized

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Easy to use. Dependable

Would Recommend

Easy to use, dependable brand, and really like the battery backup feature. Great product and it gives me comfort and confidence that this will help protect me and my family case of a carbon monoxide leak. High pitch noise that is easy to here. Highly recommend. Dont wait, go get one!

DipsSeptember 16, 2026
From Plug in Carbon Monoxide Detector Verified PurchaserIncentivized

https://photos-us.bazaarvoice.com/photo/2/cGhvdG86bG93ZXM/3bc1fe82-4247-587b-a88a-badbfb768718

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First Alert Plug in Carbon Monoxide Detector 2 -Pack

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