Code One Battery Operated Carbon Monoxide Alarm-KN-COB-B-LPM - The Home Depot
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Code One

Model # KN-COB-B-LPM

Internet # 202756110

Store SKU # 184804

Battery Operated Carbon Monoxide Alarm

Code One Battery Operated Carbon Monoxide Alarm

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

$19.97 / each


Model # KN-COB-B-LPM

Internet # 202756110

Store SKU # 184804

Store SO SKU # 198092

The Code One Battery-Operated Carbon Monoxide Alarm is intended for continuous monitoring of carbon monoxide levels. The alarm features a piezoelectric horn that is rated at 85 dB at 10 ft. The alarm is battery operated for uninterrupted monitoring, even during power outages, and runs on 2 AA batteries, which are included.

  • Use to help provide continuous monitoring of carbon monoxide levels
  • Piezoelectric horn is rated at 85 dB at 10 ft.
  • Alarm will not sound if carbon monoxide levels are below 30 PPM
  • Battery operated for uninterrupted monitoring during power outages
  • Test/reset button tests the unit for proper operation and resets the alarm
  • Operated by 2 AA batteries (included)
  • Sensor meets UL 2034 requirements
  • Note: product may vary by store

Info & Guides

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Product Depth (in.) 
Product Height (in.) 
Product Width (in.) 
Alarm Type 
Carbon Monoxide 
Alarm/Detector Features 
No Additional Features 
Battery Back-Up 
Commercial / Residential 
Commercial / Residential 
Connector/Contact Type 
Power Source 
Voltage (volts) 
Warranty / Certifications
Certifications and Listings 
1-UL Listed 


Rated 4.5 out of 5 by 131 reviewers.
Rated 5.0 out of 5.0 by Carbon Monoxide Detector Extremely easy to install. It could be wall mounted or just place on a desk or table as per instruction. It only took me 2 minutes to install one on the wall. For less than $20 a piece I strongly recommend every family gets at least one of these. You'll need at least two if you have a 2 story home. For less than $20 you can protect your home and your loved ones. July 20, 2014
Rated 5.0 out of 5.0 by Best Purchase! It saved my life My wife and I had a scary experience two days ago. Our Carbon Monoxide detector went off. The fire department came and one of them said, thank goodness your alarm went off because the Carbon Monoxide levels were very very high. He said if the alarm didn't go off and we would have slept that night, we wouldn't have woken up. I'm grateful for this alarm and recommend it to everyone! July 7, 2014
Rated 5.0 out of 5.0 by Carbon Monoxide Detector This instrument is practical and easy to install and operate. January 27, 2015
Rated 5.0 out of 5.0 by Kidde Carbon Monoxide I love the look of the Kidde Carbon Monoxide Alarm. Simple, elegant and unobtrusive, yet it offers effective protection for any home occupant. It is extremely easy to install, and testing is simple because it can be mounted at eye level. I am very satisfied with this choice and recommend it to any home owner or landlord for enhanced security against toxic gas. May 28, 2013
Rated 5.0 out of 5.0 by The Best I ever Purchased I love these, that I don't have to replace the Battery for 10 Years. They are better than the ones I used to have. Highly recommended. March 24, 2015
Rated 5.0 out of 5.0 by Carbon Monoxide Alarm Everyone should have at least three or four in their homes. My wife's father and mother were killed by this insidious gas. It creeps in and kills you before you become aware of it.... I have been using these angels of life for years and will depend on them to save my life. November 14, 2013
Rated 5.0 out of 5.0 by It actually got put to the test and worked! Well, since it's very difficult to review/test a carbon monoxide detector...I actually had a situation in my home and it worked just like it's supposed to. We were getting our carpets cleaned and the their van was in our garage with engine running. (of course garage door was open!) Over the duration of the cleaning, exhaust began entering our internal garage door into the house and this thing went crazy. Took it out back to fresh air outside and turned off. Passed the test! Just a heads up for those looking to purchase one...go for this battery operated and NOT the one that plugs into the wall with a battery backup. Any time a dog or kid rubs into the one for the electrical outlet, it goes off. Every couple weeks, goes off. Piece of junk! This one on the other hand, is small, looks good, and in my situation, it worked great. Gives me a piece of mind for family safety. January 11, 2012
Rated 5.0 out of 5.0 by very easy to understand instructions and install This product is made by a well known manufacturer at a reasonable price. Very easy to understand the instructions and to install. This is my second purchase of the same product this month. May 15, 2015
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