First Alert® Carbon Monoxide Plug In Alarm (CO605)

Item no: 5351267 | 029054122001
290  Estimated 

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  • 120V ACe plug-in with battery backup
  • For bedroom, hall or Basement
  • 85 db alarm
  • Plug in unit
  • Silence/mute button
  • Test button
  • Uses 9V battery (included)
  • Easy access battery compartment
  • Easily plugs into any standard outlet with no additional mounting necessary
  • Intelligent sensor reduces nuisance alarms
  • Samples air every second
  • Indicator power light
  • Tin oxide sensor permanently stores highest C/O reading
  • Automatically performs internal test
  • Low battery alarm & silencer
  • End of life timer
  • For questions on local legislation go to legislation-map/and click on your state or call 800-275-2576

This item can be shipped to your home. Or pickup this item at your local Ace Store for FREE*.

*Items shipped from our warehouse to stores in Alaska and Hawaii will receive a 70% shipping discount.

30-Day Return Guarantee

We want you to be fully satisfied with every item that you purchase from If you are not satisfied with an item that you have purchased (excluding Gift Cards and gas-powered outdoor equipment*), you may return the item up to thirty days after the original purchase date to receive a store credit (less shipping, handling and other charges). We recommend that you make returns of online purchases to an Ace retail store near you which will issue your store credit. If you do not have an Ace retail store near you, please contact a Customer Service Specialist by calling 1-866-290-5334 for complete return instructions. Please refer to our Return Instructions for more information about returning a purchase.

The item must be returned in good condition, in original boxes (whenever possible), and with all paperwork, parts and accessories to insure full credit. After 30 days, please contact the manufacturer directly.

*Gas-Powered Outdoor Equipment cannot be returned once gas or oil has been put in it, even if the Equipment has been drained of these materials.

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First Alert® Carbon Monoxide Plug In Alarm (CO605)

(based on 1 review)

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Reviewed by 1 customer

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(9 of 10 customers found this review helpful)


Feeling Safer

By Sugargirl

from Alameda, Ca

About Me Avid Do-It-Yourselfer

Verified Buyer


  • Early Warning
  • Inconspicuous
  • Reliable
  • Sensitive


    Best Uses

    • Living Room

    Comments about First Alert® Carbon Monoxide Plug In Alarm (CO605):

    Now that I have the carbon monoxide detector, I believe I have as secure an environment as possible. Living alone causes one to take care of all details to be safe. That action affects not only you (the consumer), but also gives family and friends a better sense of your safety.

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