First Alert Battery Operated Carbon Monoxide Alarm with Battery Backup-CO5120BN at The Home Depot
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First Alert

Model # CO5120BN

Internet # 204357249

Battery Operated Carbon Monoxide Alarm with Battery Backup

First Alert Battery Operated Carbon Monoxide Alarm with Battery Backup

This item has been discontinued.
The Home Depot no longer carries this specific product.

$34.97 / each
Item cannot be shipped to the following state(s): AK,GU,HI,PR,VI


In Stock



Model # CO5120BN

Internet # 204357249

The BRK hardwire carbon monoxide alarm detects dangerous CO gas and allows you peace of mind with its battery backup. This alarm features a controlled microprocessor for few were nuisance alarms and quick plug-in power connector for easy installation. This BRK electronics carbon monoxide alarm is listed to UL safety standards.

  • Superior carbon monoxide
  • Simple to use silence/test button
  • 9-Volt battery included
  • 7-year limited warranty

Info & Guides

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Alarm Type  Carbon Monoxide  Alarm/Detector Features  Battery Back-Up 
Assembled Depth (in.)  5.6 in  Assembled Height (in.)  5.6 in 
Assembled Width (in.)  1.9 in  Battery Back-Up  Yes 
Certifications and Listings  No Certifications or Listings  Commercial / Residential  Commercial / Residential 
Connector/Contact Type  None  Electrical Product Type  Carbon Monoxide Detector 
Included  Batteries  Returnable  90-Day 
Voltage (volts)  120 


Rated 4.3 out of 5 by 3 reviewers.
Rated 5 out of 5 by Carbon monoxide We love this product. We would recommend this product to my family and my friends October 15, 2014
Rated 5 out of 5 by Direct Replacement This is a direct replacement for the unit that was installed in our home when it was built. The original unit was 13 years old and beginning to fail. It was an easy replacement. March 24, 2014
Rated 3 out of 5 by Good product, but difficult to connect to mount This is a good product except that it is very difficult to connect to its mounting plate. I screw it in and then I notice it hanging by it's wire sometime later. November 12, 2013
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