Kidde COB/20SD10 10-Yr Battery-Powered Photoelectric Smoke Alarm & AA Battery-Powered Electrochemical CO Alarm
Kidde COB/20SD10 10-Yr Battery-Powered Photoelectric Smoke Alarm & AA Battery-Powered Electrochemical CO Alarm
Hero image 0 of Kidde COB/20SD10 10-Yr Battery-Powered Photoelectric Smoke Alarm & AA Battery-Powered Electrochemical CO Alarm, 0 of 14
Visit the Kidde Store

Kidde COB/20SD10 10-Yr Battery-Powered Photoelectric Smoke Alarm & AA Battery-Powered Electrochemical CO Alarm

|40 ratings
Kidde COB/20SD10 10-Yr Battery-Powered Photoelectric Smoke Alarm & AA Battery-Powered Electrochemical CO AlarmCarbon Monoxide Alarm and Smoke Alarm 10 year and AA Battery Powered Value Pack6 pack Kidde COB 20SD10 10 Yr Battery Powered Photoelectric Smoke Alarm AA Battery Powered Electrochemical CO Alarm4 pack Kidde COB 20SD10 10 Yr Battery Powered Photoelectric Smoke Alarm AA Battery Powered Electrochemical CO Alarm2 pack Kidde COB 20SD10 10 Yr Battery Powered Photoelectric Smoke Alarm AA Battery Powered Electrochemical CO Alarm
Pack SizeSingle

Key item features

  • Smoke detector detects smoke with over 25% faster smoke detection* and sounds a loud 85-decibel alarm with red LED light for clear visual warning
  • Smoke detector uses advanced sensing technology that helps distinguish between real smoke and everyday cooking or steam to help reduce false alarms
  • Smoke detector has a built-in 10-year battery, eliminating low-battery chirps and saving up to $40 over the life of the alarm in battery replacements
  • CO detector is AA battery-powered with 2 AA batteries included for dependable performance
  • CO detector detects carbon monoxide and sounds a loud 85-decibel alarm, signaling evacuation to fresh air
  • CO detector features LED status lights that signal power status, unit health, and carbon monoxide hazards with green, amber, and red light
  • Install the CO detector on the wall with the included mounting hardware or set on a table or countertop for convenient carbon monoxide or smoke detection
  • Both detectors feature a Test/Hush button that enables quick function checks or temporary silencing of alerts when appropriate
  • CO detector meets UL 2034 and 5th Edition standards, smoke detector meets UL 217 10th Edition and FCC standards, and both are ETL Listed

About this item

Product details

Specifications

Warnings

Customer ratings & reviews

4.9 out of 5 stars
stars
40 ratings40 reviews
How item rating is calculated
  1. 5 stars90% (36)
  2. 4 stars8% (3)
  3. 3 stars3% (1)
  4. 2 stars0% (0)
  5. 1 star0% (0)
Filtered and sorted results would be available on the new 'Customer ratings & reviews' page.
Sort by |

Showing 1-3 of 40 reviews

Jul 9, 2026
Reviewer name: KristenS
5 out of 5 stars
5 out of 5 stars review

High Quality, Safe device….yes please!

[This review was collected as part of a promotion.] Works exactly as expected! It was easy to install, feels well-made, and gives me peace of mind knowing my home has an extra layer of safety. Great value and I'd definitely recommend it!

Review from Kidde
Helpful?3LREFKO0YJZA20003253194
reply from Kidde Team

Thank you for your recommendation! We're glad to hear the installation was easy and that your purchase gives you added peace of mind. Remember to test your Smoke Alarm monthly to help ensure it's ready when you need it most.

Jul 9, 2026
Reviewer name: RobynB
5 out of 5 stars
5 out of 5 stars review

Compact enough to not be too obstructive on the wall

[This review was collected as part of a promotion.] This is a nice compact CO alarm that is really simple to use and maintain. Install was easy, and it came with screws and drywall anchors. It didn't indicate mounting height, so I looked it up and found that dedicated CO detectors can be mounted anywhere as long as it isn't on any dead air spaces, so I chose around eye level. The operating instructions are clear and you can test it by pressing and holding the button for 1 second. It also has a green light that flashes when it's working correctly. I only have a couple gas appliances, so hopefully I'll never have to test the accuracy of this device, but it does give me peace of mind.

Review from Kidde
Helpful?3LREFKO0YJZA20003253194
reply from Kidde Team

We're glad you were able to get it set up easily and test your new alarm! Thanks for making Kidde a part of your home safety plan! As a best practice, we recommend installing a CO monitor on each level of your home for maximum safety and coverage.

Jul 3, 2026
Reviewer name: LucyW
5 out of 5 stars
5 out of 5 stars review

Appears to do its job

[This review was collected as part of a promotion.] SUPER loud when testing to hear what it sounds like. Mounts into the outlet with no issues. Not to heavy to cause pulling on the outlet. I, luckly, have not actually had an issue to know how reliable it actually is.

Review from Kidde
Helpful?3LREFKO0YJZA20003253194
reply from Kidde Team

Thank you for your review! We're glad to hear installation was simple and that the alarm's test feature gave you confidence it's working properly. Testing your CO Alarm regularly is an important step in helping ensure it's ready when you need it. We hope it continues to provide you with peace of mind for years to come.

Current price is $58.47
Price when purchased online
  • Free shipping
  • Free Holiday returns until Jan 31
Walmart Protection Plan by Allstate

(Only one option can be selected at a time)

How do you want your item?

Try 30 days for just $1! Choose a plan at checkout.
How do you want your item?
Ships to
Arrives by Tomorrow
Sold and shipped by Walmart.com
Extended holiday returns
Free Holiday returns until Jan 31
This item is gift eligible
walmart plus

Try 30 days of Walmart+ for just $1!

T&C apply.