Model # 21027451

Internet #205423758

Store SKU #1000392353

Kidde Plug In Carbon Monoxide Alarm with Battery Back-Up
0047871257652

Kidde

Plug In Carbon Monoxide Alarm with Battery Back-Up

  • Plugs directly into AC wall out for easy installation
  • UL # KN-COB-DP2
$2697 /each
store icon Loading Buying Options...
package icon Loading Buying Options...
Sorry, but we ran into issues loading these options. Please try refreshing.

Frequently Bought Together

Product Overview

  • Plugs directly into AC wall out for easy installation
  • UL # KN-COB-DP2
Kidde AC/DC carbon monoxide alarm plugs directly into your home's standard wall outlet. The 9-Volt battery backup provides protection even during power outages when many CO incidences occur. Tamper resist feature deters tampering or theft of the unit.

Product Overview

  • Plugs directly into AC wall out for easy installation
  • UL # KN-COB-DP2
Model #: 21027451
Sku #: 1000392353
Internet #: 205423758

Kidde AC/DC carbon monoxide alarm plugs directly into your home's standard wall outlet. The 9-Volt battery backup provides protection even during power outages when many CO incidences occur. Tamper resist feature deters tampering or theft of the unit.

Info & Guides

You will need Adobe® Acrobat® Reader to view PDF documents. Download a free copy from the Adobe Web site.

Customers Also Compared These

Price
$26.97 /each
$27.22 /each
$43.97 /each
$49.97 /each
Name Plug In Carbon Monoxide Alarm with Battery Back-Up Plug-In Carbon Monoxide Alarm with Digital Display and Battery Backup Plug-In Carbon Monoxide Alarm with Digital Display and 9-Volt Backup 10 Year Worry Free Plug-In CO Alarm for Living Area
Brand Kidde First Alert Kidde Kidde
Ratings (54) (101) (139) (78)
Power Source Plug-In Battery Plug-In Plug-In
Alarm/Detector Features Battery Back-Up Digital display Battery Back-Up,Digital display,Hush Feature 10-Year Battery,Battery Back-Up,Digital display,Hush Feature,Tamper Resistant
View Product View Product View Product View Product

Specifications

Dimensions

Product Depth (in.)
1.5
Product Height (in.)
4.5
Product Width (in.)
2.75

Details

Alarm Type
Carbon Monoxide
Alarm/Detector Features
Battery Back-Up
Battery Back-Up
Yes
Commercial / Residential
Residential
Connector/Contact Type
None
Included
Batteries
Pack Size
1
Power Source
Plug-In
Returnable
90-Day
Voltage (volts)
120

Warranty / Certifications

Certifications and Listings
1-UL Listed

Specifications

Dimensions

Product Depth (in.)
1.5
Product Height (in.)
4.5
Product Width (in.)
2.75

Details

Alarm Type
Carbon Monoxide
Alarm/Detector Features
Battery Back-Up
Battery Back-Up
Yes
Commercial / Residential
Residential
Connector/Contact Type
None
Included
Batteries
Pack Size
1
Power Source
Plug-In
Returnable
90-Day
Voltage (volts)
120

Warranty / Certifications

Certifications and Listings
1-UL Listed

Questions & Answers

Why does the device chirp? The battery is new. It has been unplugged. Does it need to be plugged into elec outlet to prevent chirping?

Asked by: Hailey
the unit, if unplugged, will chirp as a warning: 'the unit is unplugged'
Answered by: mistaed
Date published: 2017-07-18

Discrepancy -- see detail below.

Some ads for this Kidde Model # KN-COB-DP2 say battery backup is via 2 AA batteries. Other ads say a 9-volt battery is required. ????????
Asked by: Stew
That is the correct Model # and it takes 2 AA alkaline batteries. It states I should replace in 7/2025.
Answered by: JPson
Date published: 2015-12-19

how many years does this last?

how many years does this last?
Asked by: jvvv
Hello Jvvv, If the carbon monoxide detector was manufactured 2013-forward, it has a 10 year life. Prior to 2013 had a 7 year life. Thank you for choosing Kidde.
Answered by: BrandAnswers
Date published: 2017-11-03

How many do you need in a 1800 sq ft home? Where in the home do you recommend to install it?

How many do you need in a 1800 sq ft home? Where in the home do you recommend to install it?
Asked by: Mari
I'd put one in each bedroom.
Answered by: CLMCIN
Date published: 2017-06-18
  • y_2017, m_11, d_18, h_5CST
  • bvseo_bulk, prod_bvqa, vn_bulk_2.0.3
  • cp_1, bvpage1
  • co_hasquestionsanswers, tq_13
  • loc_, sid_205423758, prod, sort_[SortEntry(order=NUM_ANSWERS, direction=DESCENDING), SortEntry(order=SUBMISSION_TIME, direction=DESCENDING), SortEntry(order=LAST_APPROVED_ANSWER_SUBMISSION_TIME, direction=DESCENDING), SortEntry(order=LAST_APPROVED_ANSWER_SUBMISSION_TIME, direction=DESCENDING), SortEntry(order=BEST_ANSWER_FEEDBACK_COUNT, direction=DESCENDING), SortEntry(order=POSITIVE_ANSWER_FEEDBACK_COUNT, direction=DESCENDING), SortEntry(order=NUM_ANSWERS, direction=DESCENDING)]
  • clientName_homedepot
  • bvseo_sdk, java_sdk, bvseo-3.1.1
  • CLOUD, getContent, 98ms
  • QUESTIONS, PRODUCT

Customer Reviews

Plug In Carbon Monoxide Alarm with Battery Back-Up is rated 4.5 out of 5 by 54.
Rated 1 out of 5 by from total GARBAGE!!!!!. I purchased on of these to put by my fireplace and decided to put it to the t... total GARBAGE!!!!!. I purchased on of these to put by my fireplace and decided to put it to the test to see if it actually worked. SO,... I started my f150 which has one hollowed out catalytic converter thanks to the mistake of a local muffler shop, and because of that I knew it was pumping out Carbon Monoxide. I then pulled out an extension cord, connected the unit, waited until it showed green and started the truck with the detector sitting face first right on the tail pipe...........NOTHING, NOTHING AT ALL happened, just stayed illuminated green.... HMMMMMM...
Date published: 2017-11-07
Rated 5 out of 5 by from replaced an older model that expired was also Kidde... replaced an older model that expired was also Kidde
Date published: 2017-10-17
Rated 5 out of 5 by from Most homeowners need to buy a carbon monoxide detector as a result of an Occupancy inspection by... Most homeowners need to buy a carbon monoxide detector as a result of an Occupancy inspection by their municipality, so you need to obtain and install the product in a very timely manner The best thing about this product is that it plugs into an electrical outlet - no need to hire a handyman / climb a ladder to install on ceiling. Product worked perfectly and tested perfectly. Of course, I hope the detector never has to detect an actual carbon monoxide leak...
Date published: 2017-05-23
Rated 5 out of 5 by from It is ready to go out of the box, and... It is ready to go out of the box, and includes batteries for the backup feature. Simply open the package, pull the battery tab and plug it in. It is a good value for a basic CO alarm. You don't need all the extras the higher-priced monitors feature. All you want is an alarm if CO exceeds safety standards. This works perfectly.
Date published: 2017-06-13
Rated 5 out of 5 by from There were installed because I was selling the house and... There were installed because I was selling the house and we needed CM detectors. They passed inspection and all is well.
Date published: 2017-11-01
Rated 5 out of 5 by from So easy, just plug it in. It even comes with the batteries which for backup if electricity goes o... So easy, just plug it in. It even comes with the batteries which for backup if electricity goes out. So convenient!
Date published: 2017-06-21
Rated 4 out of 5 by from Design and size just right makes it easy to plug... Design and size just right makes it easy to plug in and become part of the decor. Very pleased!
Date published: 2017-10-04
Rated 5 out of 5 by from I had this brand before and was totally happy with... I had this brand before and was totally happy with it. that is why I choose it. Thank you
Date published: 2017-09-01
  • y_2017, m_11, d_18, h_5
  • bvseo_bulk, prod_bvrr, vn_bulk_2.0.3
  • cp_1, bvpage1
  • co_hasreviews, tv_0, tr_54
  • loc_, sid_205423758, prod, sort_[SortEntry(order=RELEVANCE, direction=DESCENDING)]
  • clientName_homedepot
  • bvseo_sdk, java_sdk, bvseo-3.1.1
  • CLOUD, getContent, 109ms
  • REVIEWS, PRODUCT