Kidde

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

1567+ bought in the past month

$42.94$45.97

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
$42.94
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Product details

BrandKidde
StyleDetector
Power SourcePlug In
ColorWhite
Product Dimensions1.75"D x 3.75"W x 6.06"H
AlarmAudible
Operating Humidity5% to 95% relative humidity, non-condensing
Compatible DevicesResidential
Upper Temperature Rating37.8 Degrees Celsius
Sensor TypeIonization

Technical specifications

brandKidde
styleDetector
power_sourcePlug In
colorWhite
product_dimensions1.75"D x 3.75"W x 6.06"H
alarmAudible
operating_humidity5% to 95% relative humidity, non-condensing
compatible_devicesResidential
upper_temperature_rating37.8 Degrees Celsius
sensor_typeIonization
global_trade_identification_number00784908007605
materialABS
number_of_items1
manufacturerKidde
upc784908007605
part_number900-0076
item_weight1.08 pounds
item_model_numberKN-COPP-3
batteries2 AA batteries required. (included)
is_discontinued_by_manufacturerNo
size1 Pack
finishwhite
patternDetector
shapeRectangular
voltage120 Volts
wattage1 KW
installation_methodPlug-in
luminous_flux1 Lumen
number_of_handles1
cutting_diameter1 Centimeters
certificationYes
usageAmateur
included_componentsone 9V battery, one CO alarm, model KN-COPP-3, one mounting hardware packet (for wall-mount option), one user manual
batteries_includedYes
batteries_requiredYes
battery_cell_typeAlkaline
description_pileDURACELL 9V
battery_capacity9
warranty_description10 Year Limited
assembled_diameter1 Centimeters
best_sellers_rank#697 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #6 in Carbon Monoxide Detectors #6 in Smoke & Carbon Monoxide Alarms
date_first_availableJanuary 16, 2007

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Customer reviews

4.727,611 ratings

Customers say

Customers find the carbon monoxide detector reliable and easy to install, with a digital display that's easy to read.

★★★★★

Kidde is a brand to trust --great product!

CustomerDecember 3, 2025

Works great! Just plug it in and put in the back up battery and you are ready to go. These last 10 years, so be sure to be ready to purchase again in 10 years! Read more

★★★★★

Quality CO detector. Worthwhile investment.

AJApril 28, 2024

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! Read more

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★★★★★

Reliable, Easy to Use, and Gives Peace of Mind 🏠⚠️

tara speeceNovember 3, 2025

I purchased the Kidde Carbon Monoxide Detector for my home, and it has been excellent. The plug-in design with a 9-volt battery backup is very convenient, ensuring continuous protection even during power outages. The digital LED display clearly shows CO levels, which is helpful for peace of mind. Installation was straightforward—just plug it in and insert the battery. The alarm is loud and responsive, and the unit has a solid, durable feel. I also like the compact design, which fits nicely on any wall without being obtrusive. This detector gives me confidence that my family is safe from carbon monoxide, and it’s reassuring to know it’s reliable and easy to maintain. Simple to use, highly dependable, and a must-have for every home. Read more

★★★★☆

Very large

CustomerNovember 20, 2025

No problems with functionality to report but know that it’s very large. Read more

★★★★★

absolutly essential for a safer home .

Gary R.January 2, 2026

I got these mainly cause I live alone and 70 yrs old. I installed them as per instructions . Then tested them , I would like to say they meet any and all expectations I had about them. I can surely reccommend them to someone in need of a device like this for your protection . Read more

★★★★★

Big improvement 🏆

#AskMissPatienceFebruary 7, 2025

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 😊 Read more

★★★★★

Solid company, good product.

David J KlawiterDecember 7, 2025

Hasn't made a peep since I first installed it. I think that is probably a good sign! Read more

★★★★★

Easy to use, seems to work well

watcherNovember 20, 2025

Very simple, put battery in and plug it in. Shows 0 unless it encounters carbon monoxide, then it will give you a number to tell you how much. Has been on 0 for over a year so I assume my environment is and has been clear. Read more

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