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First Alert Carbon Monoxide Alarms

Carbon Monoxide alarms are capable of detecting carbon monoxide at low levels, so you can be alerted to a leak before it becomes dangerous. The best carbon monoxide alarms are easy to install and have a long battery life. Browse the top-ranked list of First Alert Carbon Monoxide alarms below along with associated reviews and opinions.

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  1. First Alert - Smoke and Carbon Monoxide Detector Hardwired - White

    SKU: JJ8Z8VQ4FT

    The First Alert device was quickly delivered by Best Buy and was easy to install...Trusted Smoke and Carbon Monoxide Detector...I would recommend this smoke and carbon monoxide detector since it is from...

    Product Description

    A hardwired, app-compatible white detector that alerts you to both smoke and carbon monoxide dangers.
    See all Smoke & Carbon Monoxide Detectors
    Your price for this item is $113.99
    Save $16
    The previous price was $129.99

  2. First Alert - Smoke and Carbon Monoxide Detector Battery Powered - White

    SKU: JJ8Z8VQ4FV

    First Alert = Peace of Mind!...But I also didn’t want the alarm to sit in a box except for the 10 -12 times a year I am away at an Airbnb or hotel… Then I saw the First Alert Battery Smart Smoke and Carbon...

    Product Description

    A battery-powered white detector that alerts you to smoke and carbon monoxide, with app compatibility.
    See all Smoke & Carbon Monoxide Detectors
    Your price for this item is $113.99
    Save $16
    The previous price was $129.99

  3. First Alert - Z-Wave Smoke and Carbon Monoxide Detector - White

    SKU: JJ8Z8VQ43T

    Product Description

    A battery-powered white alarm that detects both smoke and carbon monoxide, compatible with Z-Wave smart systems.
    See all Smoke & Carbon Monoxide Detectors
    Your price for this item is $64.99

  4. SimpliSafe - Smoke & Carbon Monoxide Detector - White

    SKU: J362VFS3VL

    Great combination and carbon monoxide alarm...Simplisafe Smoke and Carbon Dioxide detector...Simplisafe integrates another great product to my whole house monitoring system with this Smoke & Carbon Monoxide...

    Product Description

    A white, battery-powered detector that alerts you to smoke and carbon monoxide, compatible with Alexa and Google Assistant.
    See all Smoke & Carbon Monoxide Detectors
    Your price for this item is $69.99
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In-store pricing may vary. Prices and offers are subject to change. © 2026 Best Buy. All rights reserved. BEST BUY, the BEST BUY logo, the tag design, and MY BEST BUY are trademarks of Best Buy and its affiliated companies.