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Kidde Carbon Monoxide Detector, Plug In Wall with 9-Volt Battery Backup, Digital LED Display

4.7 out of 5 stars 27,169 ratings

$42.94 with 40 percent savings
List Price: $71.50
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Size: 1 Pack
Style: Detector
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Purchase options and add-ons

Brand Kidde
Style Detector
Power Source Plug In
Color White
Product Dimensions 1.75"D x 3.75"W x 6.06"H
Alarm Audible
Operating Humidity 5% to 95% relative humidity, non-condensing
Upper Temperature Rating 37.8 Degrees Celsius
Sensor Type Ionization
Global Trade Identification Number 00784908007605

About this item

  • Easy Installation - simply plug-in to a standard, 120V outlet in your home
  • 9-volt battery backup provides protection during a power outage
  • Digital LED display shows the level of carbon monoxide the CO alarm is sensing
  • 85-decibel alarm announces when carbon monoxide is detected
  • Peak Level Memory records the last time carbon monoxide was detected or when the unit was last tested

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From the manufacturer

Kidde Nighthawk Carbon Monoxide Detector
Kidde Nighthawk Carbon Monoxide Detector

Kidde Carbon Monoxide (CO) Detectors – Plug-In

CO + Digital Display

Explosive Gas + CO Alarm

10-Yr CO Alarm

10-Yr + Voice CO Alarm

Smart CO Alarm

10-Yr + Light CO Alarm

CO Alarm

Customer Reviews
4.7 out of 5 stars 27,169
4.6 out of 5 stars 16,018
4.6 out of 5 stars 16,018
4.8 out of 5 stars 62
4.1 out of 5 stars 282
4.8 out of 5 stars 117
4.7 out of 5 stars 34,316
Price
$42.94 $62.59 $62.59 $93.07 $40.00 $24.79
Detection Type
Carbon Monoxide Explosive Gas, Carbon Monoxide Carbon Monoxide Carbon Monoxide Carbon Monoxide & Air Quality Carbon Monoxide Carbon Monoxide
Power Source
Plug-In; 9V Backup (included) Plug-In; 9V Backup (included) Plug-in; 10-Yr Battery Backup Plug-in; 10-Yr Battery Backup Plug-in; 10-Yr Battery Backup Plug-in; 10-Yr Battery Backup Plug-In; 2AA Backup (included)
No Battery Changes/Night Chirp
Digital Display
Peak Level Memory
Event Memory
Voice Alerts
Connects to WiFi & Kidde App
Real-Time App Notifications
Tamper Resistant
Night Light
Mounting Options
Outlet Outlet, Wall Mount, & Tabletop Outlet;90-Degree Rotating Plug Outlet;90-Degree Rotating Plug Outlet;90-Degree Rotating Plug Outlet;90-Degree Rotating Plug Outlet;90-Degree Rotating Plug
UL Listed

Product information

Technical Details

Brand ‎Kidde
Style ‎Detector
Power Source ‎Plug In
Color ‎White
Product Dimensions ‎1.75"D x 3.75"W x 6.06"H
Alarm ‎Audible
Operating Humidity ‎5% to 95% relative humidity, non-condensing
Upper Temperature Rating ‎37.8 Degrees Celsius
Sensor Type ‎Ionization
Global Trade Identification Number ‎00784908007605
Material ‎ABS
Number of Items ‎1
Manufacturer ‎Kidde
UPC ‎784908007605
Part Number ‎900-0076
Item Weight ‎1.06 pounds
Country of Origin ‎Mexico
Item model number ‎KN-COPP-3
Batteries ‎2 AA batteries required. (included)
Is Discontinued By Manufacturer ‎No
Size ‎1 Pack
Finish ‎white
Pattern ‎Detector
Shape ‎Rectangular
Voltage ‎120 Volts
Wattage ‎1 KW
Installation Method ‎Plug-in
Luminous Flux ‎1 Lumen
Number of Handles ‎1
Cutting Diameter ‎1 Centimeters
Certification ‎Yes
Usage ‎Amateur
Included Components ‎one user manual, one 9V battery, one CO alarm, model KN-COPP-3, one mounting hardware packet (for wall-mount option)
Batteries Included? ‎Yes
Batteries Required? ‎Yes
Battery Cell Type ‎Alkaline
Description Pile ‎DURACELL 9V
Battery Capacity ‎9
Warranty Description ‎10 Year Limited
Assembled Diameter ‎1 Centimeters

Additional Information

ASIN B00002N86A
Customer Reviews
4.7 out of 5 stars 27,169 ratings

4.7 out of 5 stars
Best Sellers Rank #2,128 in Tools & Home Improvement (See Top 100 in Tools & Home Improvement)
#9 in Carbon Monoxide Detectors
#11 in Smoke & Carbon Monoxide Alarms
Date First Available January 16, 2007

Warranty & Support

Amazon.com Return Policy:Amazon.com Voluntary 30-Day Return Guarantee: You can return many items you have purchased within 30 days following delivery of the item to you. Our Voluntary 30-Day Return Guarantee does not affect your legal right of withdrawal in any way. You can find out more about the exceptions and conditions here.
Product Warranty: For warranty information about this product, please click here. [PDF ]

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Kidde Carbon Monoxide Detector, Plug In Wall with 9-Volt Battery Backup, Digital LED Display


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Product Description

Product Description

The Kidde Carbon Monoxide Detector, Plug In Wall with 9-Volt Battery Backup, Digital LED Display uses electrochemical sensor technology to detect poisonous CO gas in your home and alert you by sounding an 85-decibel alarm. Setup is easy as the Kidde carbon monoxide alarm plugs into a standard, 120V AC power outlet in your home, while a 9-volt alkaline battery (included) works as a backup in the event of a power failure. When carbon monoxide is detected, the digital display shows the level of carbon monoxide the alarm is sensing and updates every 15 seconds. Peak Level Memory records the last time carbon monoxide was detected or when the unit was tested. The Smart-Hush button silences the unit for approximately 8 minutes, which is helpful when this smoke detector carbon monoxide detector combo sounds from things like routine cooking or shower steam. Extension cord (included) allows for placement on a table or shelf. Install a carbon monoxide smoke detector combo on every level of your home and near bedrooms to help keep your family safe. UL Certified with a 10-year limited manufacturer's warranty. Meets requirements of UL 2034, UL217, NFPA72, (chapter 11 2002 edition) The State of California Fire Marshal, NFPA101 (One and two family dwellings) Federal Housing Authority (FHA), Housing and Urban Development (HUD).

Amazon.com

Protect your family from the dangers of carbon monoxide (CO) exposure with the Kidde KN-COPP-3 Nighthawk Plug-In Carbon Monoxide Alarm with Battery Backup and Digital Display. The Nighthawk is an easy-to-install unit that provides reliable protection against the dangers of CO. It features a digital display that shows CO levels in parts per million allowing you to see if, how, and when levels change.

KN-COPP-3 Nighthawk
Carbon Monoxide Alarm
At a Glance:

  • Plug-in unit with battery backup and digital display that shows CO level
  • Level button displays the peak CO level recorded by the alarm since it was last reset
  • Loud alarm pattern sounds when unit detects elevated CO levels
  • Direct-plug, 6-foot power cord, and table top mounting options.

    • Five-year limited warranty

    This discreet alarm is designed to fit into any standard A/C outlet in your house.
    View larger.

    The easy-read digital display updates every 15 seconds to indicate any abrupt changes or alarming trends in CO levels. View larger.Advanced Technology in an Easy-to-Install, Plug-In Design
    Designed for home use, the Kidde KN-COPP-3 Nighthawk is a UL-listed, A/C-powered, plug-in CO alarm that utilizes sophisticated electronic components and sensor technology to protect you and your family from the dangers of CO. It plugs directly into a standard A/C outlet and includes a 9-volt battery backup that provides continuous monitoring of CO levels--even during power outages.

    About Carbon Monoxide: The Silent Killer
    The leading cause of accidental poisoning deaths in North America, carbon monoxide (CO) is often referred to as the silent killer because it's odorless, tasteless, and invisible. Carbon monoxide poisoning can come about via a number of sources, including everyday items and appliances in your home or office. And because symptoms of CO poisoning mimic the flu or other common illnesses it can often go undiagnosed.

    Audible Alarm Pattern Alerts you to Elevated CO Levels
    When placed on every level of your home, alarms like the KN-COPP-3 Nighthawk can help protect everyone in the house from CO exposure by giving you an unmistakable signal when levels have reached an unhealthy point. If unhealthy levels are detected, the alarm will emit four quick audible beats every five seconds until either levels decrease or the reset button is pressed.

    Easy-to-Read Digital Display Shows CO Levels
    The KN-COPP-3 Nighthawk is unique among traditional CO alarms because of its digital display. This display clearly shows levels of CO that the unit has detected and stored-- from 30 to 999 ppm--and it updates every 15 seconds to indicate any abrupt changes or alarming trends. The display also shows the peak CO level recorded by the alarm since it was last reset or unplugged.

    LED Shows Sensor Status
    With the KN-COPP-3 Nighthawk, you never have to wonder if the sensor is functioning properly. A blinking dot in the lower right-hand corner of the display denotes normal operation, so you can trust that it's working. In addition, you can test alarm function by pressing the test/reset button at any time to verify that the horn and electric circuitry are operating properly.

    Convenient Mounting Options
    The KN-COPP-3 Nighthawk has a low-profile design that makes it suitable for any room in your home. The detector can be plugged into any standard A/C outlet; it's plug can be snapped into the back of the unit and can be rotated so the alarm remains vertical, independent of whether the electrical socket is mounted vertically or horizontally. In addition, the alarm comes with a 6-foot extension cord, so the unit can be plugged into the wall outlet and then placed on a table or shelf. For the most thorough protection, place an alarm on every level of your home.

    The UL-listed Kidde KN-COPP-3 Nighthawk has a seven-year life and is backed by a five-year limited warranty.

    About Kidde: A UTC Fire and Security Brand
    Renowned for global leadership in fire detection and suppression, Kidde provides solutions ranging from portable fire extinguishers to advanced industrial controls such as flame detection and explosion suppression systems. Kidde is a UTC Fire and Security brand, with a history that's rich with innovations, from the patent of the Chubb Detector Lock in 1818 to the development of the world's first wireless networked smoke detectors in 2004.

    What's in the Box
    Kidde KN-COPP-3 Nighthawk CO Alarm, 9-volt battery, mounting hardware, and installation guide.



    Keep your family safe by placing alarms and extinguishers in each area of the house, and by having a fire escape plan. Click here for a detailed image.

Top Brand: Kidde

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100K+ customers rate items from this brand highly
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Price-40% $42.94
List:$71.50
$93.00$59.99$28.98$39.99-33% $40.00
Typical:$59.94
Delivery
Get it as soon as Monday, May 5
Get it as soon as Monday, May 5
Get it as soon as Monday, May 5
Get it as soon as Monday, May 5
Get it as soon as Monday, May 5
Customer Ratings
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power source
sensor type
style
alarm
operating humidity

Important information

Ingredients

MANUFACTURED BY KIDDE WITH NIGHTHAWK TECHNOLOGY

Legal Disclaimer

New in open box

Brightness

1 lm

Color Temperature

1 °C

Wattage

1 KW

Bulb Voltage

120 volts

Customer reviews

4.7 out of 5 stars
27,169 global ratings

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Customers say

Customers find the carbon monoxide detector reliable, working well for up to 2 years and featuring a 10-year lifetime rating. They appreciate its user-friendly setup and installation, easy-to-read digital display, and consider it worth the price. The device has a loud audible alarm, and while it includes a battery backup, some customers report issues with failing batteries.

AI-generated from the text of customer reviews

1,301 customers mention "Functionality"1,195 positive106 negative

Customers find that the carbon monoxide detector works well, with some reporting it has been functioning properly for up to 2 years.

"Works great, easy to install , feel safe now ." Read more

"Very nice, works great, nice to have at a great price." Read more

"Plug and Play - used in my daughter's college apartment - no issues" Read more

"...So far seems to work well and a nice piece of mind." Read more

865 customers mention "Ease of installation"828 positive37 negative

Customers find the carbon monoxide detector easy to set up and plug in, with one customer noting that it comes with a 9V battery included.

"Works great, easy to install , feel safe now ." Read more

"Plug and Play - used in my daughter's college apartment - no issues" Read more

"...What I like about this detector is the directions have great specifics for set up to avoid false positives and a freak out. Yeah, I did...." Read more

"Easy to install! Replaced the one I have been using for the last 25 years." Read more

569 customers mention "Build quality"401 positive168 negative

Customers appreciate the carbon monoxide detector's build quality, noting its well-made construction and 10-year sensor life.

"...and I wished it was a little better packaged, but there was nothing broken and everything seemed to be there, so I'm happy...." Read more

"This unit lasts seven years, then beeps says error on the screen when it's time to replace. Of course my old unit started beeping 4am one morning." Read more

"HORRIBLE....THEY WERE DEFECTIVE AND BEEPING CONSTANTLY FOR NO REASON!" Read more

"...Dependability: The unit runs on AC with a battery backup and a long life-span from a top manufacturer. 3. Monitoring:..." Read more

542 customers mention "Value for money"480 positive62 negative

Customers find the carbon monoxide detector well-worth the price, describing it as cheap life insurance and an important piece of equipment for home safety.

"Very nice, works great, nice to have at a great price." Read more

"...Not sure how long the sale is for. But the singles are a great price now. Hope you score a savings, too...." Read more

"...I consider this unit a very good value but other models are smaller and less intrusive...." Read more

"...certainly not the cheapest CO unit on the market, but it's a good value for the money...." Read more

413 customers mention "Carbon monoxide detector"387 positive26 negative

Customers find the carbon monoxide detector effective, with one customer noting it accurately indicates when carbon monoxide is present.

"...alarm utilizes sophisticated electronic components and unmatched sensor technology to protect you and your family from the dangers of CO...." Read more

"...Tested it by running the old tractor again and it alarmed as described in the instructions...." Read more

"Quality Kidde brand CO detector...." Read more

"...good that the unit gives a beep and status (end.) when the end of service is reached." Read more

292 customers mention "Readability"280 positive12 negative

Customers appreciate the carbon monoxide detector's readability, with its clear digital display and easy-to-see readout.

"...Although it’s a bit large has a keen sense of detection. There’s no price or device size that matters with safety...." Read more

"...Easy-to-Read Digital Display Shows CO Levels The KN-COPP-3 Nighthawk is unique among traditional CO alarms because of its digital display...." Read more

"...Display is easy to read and the alarm is very loud. P" Read more

"...CO buildup from harming us, thanks to this CO detectors audible & visual alerts...." Read more

415 customers mention "Battery life"246 positive169 negative

Customers have mixed experiences with the carbon monoxide detector's battery life, with some appreciating that it has both AC power and a 9V backup, while others report that the included battery fails and runs out quickly.

"...This silent guardian is always on the job, battery back up when power is lost." Read more

"...complaint that I have, when plugged into the outlet, it tends to come loose very easily. But since it comes with the 9V battery, I was not worried...." Read more

"...Can be plugged in with the back up battery or wall mounted with battery alone. Although it’s a bit large has a keen sense of detection...." Read more

"...directly into any standard 110-volt power outlet and it has a 9-volt battery backup, battery included...." Read more

296 customers mention "Noise level"95 positive201 negative

Customers have mixed opinions about the carbon monoxide detector's noise level, with some appreciating its very loud audible alarm and loud test alarm, while others find it too noisy.

"HORRIBLE....THEY WERE DEFECTIVE AND BEEPING CONSTANTLY FOR NO REASON!" Read more

"...Well that all changed one day when I was woken out of my sleep by a LOUD alarm I had never heard before going off...." Read more

"...Display is easy to read and the alarm is very loud. P" Read more

"...It was January. When came home one night to hear a strange beeping sound. Back then we didn't have fancy smart phones like we do now...." Read more

Quality CO detector. Worthwhile investment.
5 out of 5 stars
Quality CO detector. Worthwhile investment.
Quality Kidde brand CO detector. I replaced my original one with this identical one after 10 years of service, when it finally beeped and showed "END" in the display, which renders it useless, which is by design. Ironically, I never had any CO issues or alerts, until about a few months before its 10th anniversary in service. My home's natural gas boiler was over 25 years old, and begin leaking CO from incomplete combustion issues. This Kidde CO detector audibly alerted me and displayed the current CO level as well as the maximum CO level that it had recorded. Very simple to use and displays basic, yet useful information. I was able to open the windows and ventilate my house to prevent the excess CO buildup from harming us, thanks to this CO detectors audible & visual alerts. Hope they're still making this model 10 years from now, when I will need another one, or if I decide to move and want to purchase a new one. It's certainly not the cheapest CO unit on the market, but it's a good value for the money. Oh, it plugs directly into any standard 110-volt power outlet and it has a 9-volt battery backup, battery included. Although they recommend you replace the 9V backup battery every few years, I never replaced mine, and it was still almost as good as the day it was installed. My Kidde CO detector is plugged into an outlet in our upstairs hallway just outside of our bedroom. Fortunately, it also fit perfectly next to (below) my plug-in doorbell, which was a huge plus! I'm planning on installing one in the basement, near the gas boiler as well. Should have done that years ago, as we would have likely received an earlier "heads-up" that there was a combustion problem with the boiler. One last note: You can remote wall-mount this unit also. Cool feature! If you look at the last picture that I posted with this review, you can see that when the rear access cover is removed to access the backup battery, there is extra cord stored on the opposite side of the battery. The connected main power source plug can be easily removed and relocated/extended, via the corded connection, in order to have the CO detector located somewhere other than directly plugged into the power source. There is also a handy little clear plastic packet included, containing two wood/mounting screws and two wall mount plastic expanding inserts. (Not shown in picture.) Just can't say enough good stuff about this unit. Very pleased with it!
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Top reviews from the United States

  • Reviewed in the United States on March 17, 2025
    Size: 1 PackStyle: DetectorVerified Purchase
    Works great, easy to install , feel safe now .
    One person found this helpful
    Report
  • Reviewed in the United States on March 18, 2025
    Size: 1 PackStyle: DetectorVerified Purchase
    Very nice, works great, nice to have at a great price.
  • Reviewed in the United States on March 24, 2025
    Size: 1 PackStyle: DetectorVerified Purchase
    Plug and Play - used in my daughter's college apartment - no issues
  • Reviewed in the United States on January 3, 2025
    Size: 1 PackStyle: DetectorVerified Purchase
    This arrived quickly, and I wished it was a little better packaged, but there was nothing broken and everything seemed to be there, so I'm happy. However, the fact it has a 10-year warranty and I lost a year as it is already years old makes me wonder, but we shall see. My furnace guy suggested I get something like this, so I went looking hoping he'll approve when he comes next year, but also hoping I won't need this thing to be honest. So far seems to work well and a nice piece of mind.
  • Reviewed in the United States on April 13, 2025
    Size: 1 PackStyle: DetectorVerified Purchase
    CO is deadly protect your family! This silent guardian is always on the job, battery back up when power is lost.
  • Reviewed in the United States on February 7, 2025
    Size: 1 PackStyle: DetectorVerified Purchase
    Upon recommendation for ability, and the fact our current CO detector is pushing seven during renovations. It attaches to the ceiling. Figured replacement early based on quality of function for new device and huge savings to buy two as singles if worth it. As vintage ceiling tile are being installed and this device is flexible as to where it sets up. Can be plugged in with the back up battery or wall mounted with battery alone.

    Although it’s a bit large has a keen sense of detection. There’s no price or device size that matters with safety. But if ya can score a discount kudos.

    No matter what detector you buy make sure it has a digital read on how much CO2 is invading when it does.

    To know what’s safe … 0 😁 all seriousness, under 30. The booklet explains the levels. How the device will function in a warning situation. Symptoms o look out for. How long it’ll take to read CO2 depending on how severe it is.

    It’s recommended to take one on trips when staying at hotels and this detector is easy to set up anywhere. The two pronged action is helpful since this vintage house has a mix of two and three. But for a trip the 9 volt battery is good to go.

    For RVers this is a must have. Even in a van camping. Better to be safe than sorry.

    Tip: Write the date of install in permanent marker on the face. This way no need to remember.

    Tip 2: Same with smoke and fire detectors. For those , what I do is write the yr and month the battery is changed every time. Thin permanent marker should leave plenty of room.

    Unless hardwired and in ten you just emplacements it. Still, add the date of install. Same with fire extinguishers. Doesn’t hurt to have the fire department inspect it periodically.

    I know people who’ve lost their hem to fire. Not fun. I know people, like myself, a CO detector got us outta the house.

    What I like about this detector is the directions have great specifics for set up to avoid false positives and a freak out. Yeah, I did. It was scary. Thank goodness the two times it was for real we were safe.

    Though at that time we didn’t have a level readout. That’s what makes this gem such a peace.

    Not sure how long the sale is for. But the singles are a great price now. Hope you score a savings, too.

    Hope I never hear these defectors go off. But I feel save knowing new ones are in place every ten or less years, if your renovating, where to restock 😊
    9 people found this helpful
    Report
  • Reviewed in the United States on April 2, 2025
    Size: 1 PackStyle: DetectorVerified Purchase
    Good product, well packaged.
  • Reviewed in the United States on April 25, 2025
    Size: 1 PackStyle: DetectorVerified Purchase
    Easy to install! Replaced the one I have been using for the last 25 years.

Top reviews from other countries

  • Mrs Stella Nicholson
    1.0 out of 5 stars Did not work
    Reviewed in the United Kingdom on September 1, 2021
    Size: 1 PackStyle: DetectorVerified Purchase
    I have a boiler in one of the bed rooms so thought it was important to have a good alarm .put battery in plugged it in .Reading came up as "0".The next morning it did intermittent bleep I went to check it the battery was flat the plug was red hot ,fire hazard so I sent it back cost me £12.75 to send it to Spain !!!
  • Fred lorusso
    5.0 out of 5 stars good product
    Reviewed in Canada on January 3, 2020
    Size: 6 PackStyle: Pack of 6Verified Purchase
    Good product (i have used it before as well) and i appreciated that they came with batteries for the back up feature.
  • Matt & Kim
    4.0 out of 5 stars They seem good, a couple were banged up from shipping but ...
    Reviewed in Canada on April 15, 2018
    Size: 6 PackStyle: Pack of 6Verified Purchase
    They seem good, a couple were banged up from shipping but they still work. All of them were manufactured well over a year ago... so only time will tell if they still last ten years or not.
  • Don
    1.0 out of 5 stars poor quality control.
    Reviewed in Canada on January 14, 2017
    Size: 6 PackStyle: Pack of 6Verified Purchase
    Two of the 12 packages were missing the battery pack and the battery Holder. Also missing was the back cover....