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Kidde Hardwired Smoke & Carbon Monoxide Detector, AA Battery Backup Smoke Alarm, Interconnectable, LED Warning Light Indicators, Meets New UL Standard

  • Based on 206 reviews
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Availability: In Stock.
Fulfilled by Amazon

Arrives Wednesday, Jul 23
Order within 14 hours and 42 minutes
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Style: 9th Edition


Size: 1 Pack


Features

  • 2-IN-1 DETECTION: Alerts you to both smoke & carbon monoxide (CO) using a single, cost-effective detector.
  • HARDWIRED & 2 AA BATTERY BACKUP (Included): Operates on 120V AC wiring (installed in the ceiling) with 2 AA alkaline batteries that provide battery backup coverage during power outages.
  • ENHANCED SENSING TECHNOLOGY: Reduces false smoke alarms often caused by cooking. Comprehensively tested to meet the latest UL standards, meets UL 217 9th Edition, UL 2034 4th Edition, & FCC standards.
  • INTERCONNECT CAPABILITY: When one alarm sounds, they all sound, so you can get out faster. (Different models offer different interconnection options and requirements. See User Guide for more info.)
  • SELF-TESTING ALARM: Internal components ensure alarm is always operating as expected. Not a substitute for a manual push test, perform a button test once per week to verify alarm operation.
  • 3 LED NOTIFICATIONS: LED lights indicate alarm status, green = normal operation, amber = operating error, red = smoke or carbon monoxide detected & a loud 85-decibel alarm will sound.
  • TEST & HUSH BUTTON: Makes it easy to test the 5-inch combination detector and silence false alarms, should they occur.
  • 10-YEAR LIMITED WARRANTY: Warranty begins when the alarm is powered on. If that date is unknown, it should be assumed that alarms should be replaced.

Description

Experience the next level of fire safety with the Kidde Hardwired Smoke & Carbon Monoxide Detector, AA Battery Backup, Interconnectable, LED Warning Light Indicators, model 30CUAR. This smoke & CO detector has enhanced sensing technology that reduces false alarms often caused by cooking and sends fast alerts that help give your family more time to get out safely. To detect carbon monoxide, an electrochemical sensor is used. This alarm offers a modern 5-inch design ideal for all living spaces such as living rooms, hallways, kitchens, & bedrooms. Comprehensively tested and designed to the latest UL standard for safety and reliability, the 5-inch smoke & CO alarm is powered by 120V AC wiring with 2 AA alkaline replaceable backup batteries (included) for continual detection even during outages. Batteries should be replaced every 6 months or when the alarm sounds a low battery chirp. In addition, it’s self- testing and easy to install with the included twist-and-click mounting bracket. This Kidde combination alarm is equipped with end-of-life notifications that will beep to remind you it’s time to replace it at the of its 10-year lifespan. Meets requirements of 9th Edition UL 217, UL 2034 4th Edition, FCC, and CSFM.

Brand: Kidde


Style: 9th Edition


Power Source: Hardwired


Color: White


Product Dimensions: 1.88"D x 5"W x 5"H


Item Weight: 10.46 ounces


Alarm: Smoke and Carbon Monoxide Detector


Operating Humidity: 10 to 95% relative humidity (RH), non-condensing


Upper Temperature Rating: 100 Degrees Fahrenheit


Sensor Type: Photoelectric, Electrochemical


Brand: ‎Kidde


Style: ‎9th Edition


Power Source: ‎Hardwired


Color: ‎White


Product Dimensions: ‎1.88"D x 5"W x 5"H


Item Weight: ‎10.46 ounces


Alarm: ‎Smoke and Carbon Monoxide Detector


Operating Humidity: ‎10 to 95% relative humidity (RH), non-condensing


Upper Temperature Rating: ‎100 Degrees Fahrenheit


Sensor Type: ‎Photoelectric, Electrochemical


Material: ‎Plastic


Number of Items: ‎1


Manufacturer: ‎Kidde


UPC: ‎047871328475


Part Number: ‎21032847


Item Weight: ‎10.5 ounces


Country of Origin: ‎China


Item model number: ‎30CUAR


Batteries: ‎2 AA batteries required. (included)


Size: ‎1 Pack


Shape: ‎Circular


Item Package Quantity: ‎1


Included Components: ‎User Guide, 2 AA Batteries, Alarm, Mounting Hardware


Batteries Included?: ‎Yes


Batteries Required?: ‎Yes


Battery Cell Type: ‎Alkaline


Date First Available: April 29, 2024


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Wednesday, Jul 23

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Top Amazon Reviews


  • Silent, Reliable, and No More Mystery Beeps!
After finally finding out which smoke alarm was beeping at me like a tiny, relentless banshee, I ordered this as a replacement. It arrived quickly—faster than my patience was wearing thin—and installation was surprisingly easy. I’m no electrician, but even I managed to get it up and running without calling in reinforcements. The LED indicators are a nice touch, giving clear signals instead of the usual cryptic chirps that leave you questioning your life choices at 2 AM. It also syncs with other alarms, which is great for safety but slightly terrifying when testing them—like setting off a mini fire drill in your own home. Pros: ✔ Quick and easy installation ✔ Clear LED warning lights (no more mystery beeping!) ✔ Interconnects with other alarms for full-home protection ✔ Meets updated safety standards Cons: ✖ The alarm sound is intense (which is the point, but still… it will wake the dead) ✖ No option to silence minor false alarms quickly—toast lovers, beware Overall, it’s a solid upgrade that does its job well. If only it could also detect which alarm is beeping before I lose my sanity next time! ... show more
Reviewed in the United States on February 1, 2025 by Kindle Customer

  • Wonderful product
works great and installation and mounting was incredibly easy, its all you can ask for in a smoke alarm. Battery life thus far has been amazing, it will definitely wake you up if it goes off, it is super loud, the price is on par with other reputable brands.
Reviewed in the United States on March 31, 2025 by Dalton Vanatta

  • Good replacement, clean regularly
Good smoke detector, but very difficult to replace the batteries. The release tab requires a screwdriver or knife to pry the connector off so the battery door can open. These appear to be more sensitive than older models, as I need to clean them every couple of months with air spray or they chirp with a “fault code”. I called Kidde Customer Support and they walked me through diagnostics and cleaning, after which it had worked fine. ... show more
Reviewed in the United States on March 23, 2025 by Doug T.

  • Happy with our new detectors.
Purchased for major home renovation. Look nice and does the job. Super easy to install.
Reviewed in the United States on March 21, 2025 by G. Stephan

  • Perfect replacement for the old model
I bought this to replace the older model. I was concerned by the reviews that it wouldn't fit the old bracket, but that was not an issue. You do have to buy the plug adapter though, but that was an easy install as well. There are quite a few different models, so if you need one that talks make sure it specifically says that in the product description and the box. ... show more
Reviewed in the United States on April 27, 2025 by MCoer

  • Don’t buy unless you understand electrical wiring!!!
We bought 2 of these 3 months ago to replace ones that were 10 years old. I am mid 70s, spouse is mid 80s. Son in law installed when he was here for Thanksgiving. Yesterday we got the low battery beep the old one batteries got replaced once a year or less). I spent several hours looking for instructions to change battery. There are none. So I looked at the how to install directions and followed them backwards. From what I am seeing. You can’t open the battery box unless you UNHOOK THE WIRES! Well isn’t that user friendly for un unmechanical female older homeowner! Now I get to call our handyman and pay him to replace a stupid battery! Sooooo - Kidde has lost my recommendation and my business forever. ... show more
Reviewed in the United States on February 16, 2025 by MWalters MWalters

  • Works well
Great produce. The quality is good, very accurate alarms, nice size, durable and loud noise and voice alerts to wake you up and notify you of problems.
Reviewed in the United States on February 14, 2025 by M M

  • Works !
Works!
Reviewed in the United States on April 25, 2025 by Joshua Jordan

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