Message to Our Customers


Model # KN-COPE-I

Internet # 203270945

Store SKU # 340292

120-Volt Hardwired Inter Connectable Photoelectric Smoke and Carbon Monoxide Alarm with Battery Backup (3-Pack)

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

$129.00 / each



Model # KN-COPE-I

Internet # 203270945

Store SKU # 340292

Store SO SKU # 198092

The Kidde front loading smoke and carbon monoxide alarm offers protection from two hazards - fire and carbon monoxide in one unit. This AC wire -in alarm has battery back up that will provide you and your family with protection during short term power outages. Manufactured with photoelectric sensors for detecting smoke and fire, this alarm also includes the world most accurate carbon monoxide sensing technology; based on claims by major manufacturers.

California residents: see  Proposition 65 information

  • Emits a loud beeping tone followed by a voice warning that clearly announces the danger, fire or warning carbon monoxide and voice feature also alerts you if hush or cancel is activated
  • Smart touch button - one button performs multiple functions; activates hush, test units electronics, activates peak level memory, resets the unit during a carbon monoxide alarm, silences a low battery chirp for up to 12 hours and silences the end of life chirp for two days
  • Tamper resistant - unit will lock to mounting bracket and battery door will lock to deter theft or tampering
  • Front loading battery door provides access to the battery chamber - allowing you to change the battery without removing the unit from the mounting bracket
  • Unit is inter connectable with up to 24 other devices of which 18 can be initiating including smoke, carbon monoxide and heat alarms
  • Alarm has two methods of warning for danger; a piezoelectric horn that is rated at 85 dB at 10 ft. and a voice warning that identifies the danger

Info & Guides

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Product Depth (in.) 
Product Height (in.) 
Product Width (in.) 
Alarm Sensor Type 
Alarm Type 
Carbon Monoxide,Smoke 
Alarm/Detector Features 
Battery Back-Up,Hush Feature,Interconnected,Value Pack,Voice Alert 
Commercial / Residential 
Commercial / Residential 
Connector/Contact Type 
Power Source 
Voltage (volts) 
Warranty / Certifications
Certifications and Listings 
1-UL Listed 


Rated 4.4 out of 5 by 143 reviewers.
Rated 5.0 out of 5.0 by Great features for a great price! I was so annoyed with the contractor grade smoke detectors that were installed when the house was built, I took them all down. There were so many false alarms at 2:30AM, I couldn't take it anymore. I saw these ones which were a little more expensive and gave them a try. I love the voice features! It is nice to know what I'm suppose to be running from if I'm scared out of sleep at 3:00AM. All I had to do was un-nut the pig-tails from the old system, and wire the included pig-tails with this system. Everything works like a champ. I have a fully connected, AC system with battery backups. It was so easy, I'm going to buy more and put them where the other smoke detectors use to be. The only negative were the directions. They were small and not great, but matching colors of electrical wire isn't hard. June 14, 2013
Rated 5.0 out of 5.0 by This product was the solution I needed! I added on to my house and had to bring all the smoke detectors up to current code. That meant installing wire, boxes, and new detectors. Where I live I needed interconnected detectors. I was replacing dual (ion/photo) battery operated alarms which I had installed several years ago and was happy to find these that included photoelectric, carbon monoxide, voice alert, and battery backup. Single units with all those features can be expensive when installing several at once - so finding a 3-pack that saved me about 1/3 on cost helped a lot (I didn't have to settle for a lesser product). Installation of the detectors was a breaze and they've been working great. Thanks Home Depot! March 1, 2013
Rated 4.0 out of 5.0 by good product Good product replaced our old kidde alarms with these we did have to wire the new plug because they changed the design but it was easy to do. Also installed three kidde ion alarms with these April 27, 2013
Rated 1.0 out of 5.0 by **FALSE ALARMS** In short, these models are prone to false-smoke alarms @ random hours during the night. I am certain there is nothing wrong with the wiring more installation in any way. These are simply a poor design. I have had no issued with the competing brand I was previously using before I replaced them with these new units. Out of 8 alarms in my system, I have already had to exchange TWO faulty units so far in the first 2 months of use. These are suppose to be guaranteed for 10 years?! Read the bad reviews on Amazon & Home depot that reflect that this is NOT an isolated issue November 19, 2014
Rated 5.0 out of 5.0 by I feel much safer now that I have smoke and CO2 alarms. I installed them myself. I have never installed anything before. Instructions were very straight-forward and after installation I was proud as a peacock! December 13, 2014
Rated 5.0 out of 5.0 by 3pack combo Smoke/CO2 alarms Home depot had the best price on the 3 pack of interconnectable Kidde/FireX KNCOPE1 smoke/CO2 alarms. I found the originals in my house were 28 years old and due for replacement. Swap was really simple with included wiring adapters and mounting rings. Tested and all alarms are loud, interconnected as expected and functional. The order came in good condition with no issues and was delivered in the expected time frame. I'm overall happy with my purchase and my peace of mind with new functional alarms to protect my family. December 10, 2013
Rated 5.0 out of 5.0 by Easiest install The voice alerts are great, especially knowing the difference between carbon monoxide and fire. When one of them is set off, all of the others are set off too. I installed three in 20 minutes. November 8, 2012
Rated 4.0 out of 5.0 by Good way to meet safety standards The alarms were look-alike replacements for some 11 year old smoke detectors, allowing me to bring my home to current VA safety specifications with only a little work and no more clutter in my home. The wiring directions were clear enough that it only took a few minutes to install all 3. April 8, 2015
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