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First Alert Powered Alarm SCO5CN Combination Smoke and Carbon Monoxide Detector, Battery Operated, 1 Pack, White

4.6 out of 5 stars 30,552 ratings
#1 Best Seller in Smoke & Carbon Monoxide Alarms
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Size: 1-Pack
Style: Standard Detection
Pattern Name: SCO5CN
Brand First Alert
Style Standard Detection
Power Source Battery Powered
Color White
Product Dimensions 2"D x 5"W x 5"H
Alarm Audible
Sensor Type electrochemical,photoelectric
Global Trade Identification Number 00029054856920
Material Carbon
Number of Items 1

About this item

  • The front cover design of the alarm may vary but product function remains the same.
  • Keep your family safe with this battery operated smoke and carbon monoxide alarm; Battery powered alarms provide continuous monitoring of CO levels, even if there's a power failure
  • Features an electrochemical carbon monoxide sensing technology as well as a photoelectric sensor that detects the larger particles of a smoldering fire
  • Indicator lights on the face of the unit display the presence of smoke or carbon monoxide, while an 85 decibel siren provides a clear, loud warning upon detection
  • Battery operated unit installs quickly and easily without an electrician. Low battery signal mute, quiets low battery signal for up to 8 hours
  • Simple to use, with a single test/silence button; EZ access battery drawer allows you to change battery without removing alarm from ceiling
  • It can ship within the US except New York
  • First Alert has been the most trusted brand in home safety since launching the first residential smoke alarm in 1958 (Based on a First Alert Brand Trust Survey in February 2018)

From the manufacturer

1

Install Precision Detection

First Alert’s advanced sensing technology complies with the latest smoke alarm standards to help reduce cooking nuisance alarms and detect smoke from synthetic materials to provide an early warning.

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Product information

Technical Details

Brand ‎First Alert
Style ‎Standard Detection
Power Source ‎Battery Powered
Color ‎White
Product Dimensions ‎2"D x 5"W x 5"H
Alarm ‎Audible
Sensor Type ‎electrochemical,photoelectric
Global Trade Identification Number ‎00029054856920
Material ‎Carbon
Number of Items ‎1
Manufacturer ‎First Alert
UPC ‎029054856920
Part Number ‎SCO5CN
Item Weight ‎8.8 ounces
Item model number ‎SCO5CN
Is Discontinued By Manufacturer ‎No
Size ‎1-Pack
Pattern ‎SCO5CN
Voltage ‎120 Volts
Item Package Quantity ‎1
Measurement System ‎Metric
Included Components ‎Carbon Monoxide Detector
Batteries Included? ‎Yes
Batteries Required? ‎Yes
Battery Cell Type ‎Alkaline
Warranty Description ‎-------

Additional Information

ASIN B000MXJ498
Customer Reviews
4.6 out of 5 stars 30,552 ratings

4.6 out of 5 stars
Best Sellers Rank
Date First Available January 1, 2008

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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First Alert Powered Alarm SCO5CN Combination Smoke and Carbon Monoxide Detector, Battery Operated, 1 Pack, White

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Product Description

Product Description

The First Alert SCO5CN Combination Smoke and Carbon Monoxide Alarm features dual sensors to detect both smoke and carbon monoxide in a single device. A photoelectric sensor detects the smoke most often produced by smoldering fires, and minimizes false alarms from cooking smoke or shower steam. Additionally, the advanced electrochemical CO sensor detects carbon monoxide leaks from multiple sources, such as faulty fuel burning appliances, blocked chimneys, and generators running inside or too close to homes. A loud, 85 decibel siren alerts you to the threat; unique alarm sounds and indicator lights on its face distinguish a smoke warning from a carbon monoxide warning. This carbon monoxide and smoke detector is battery operated, so you don't need an electrician for installation. Requiring just two AA batteries and featuring an easy access battery compartment for quick changes, this smoke and carbon monoxide detector has a single button that allows you to silence a false alarm or test the unit.

Amazon.com

Carbon monoxide (CO) is the leading cause of accidental poisoning deaths in America, yet many people don't know they are suffering from CO poisoning until its too late. Since symptoms of CO poisoning are like the flu, you might not even know you're in danger at first. That's why a carbon monoxide alarm is an excellent way to protect your family. It can detect the CO you can't see, smell or taste in the air.

The First Alert SCO5CN carbon monoxide and smoke alarm uses an electrochemical carbon monoxide sensor-the most accurate technology available. The alarm uses photoelectric smoke sensing technology which is environmentally friendlier and which reduces nuisance alarms, making it ideal for cooking areas. It is also great for sensing slow smoldering fires quickly. The permanent sensors last the lifetime of the alarm. The test/silence button both silences a non-threatening alarm or low battery warning and allows you to test the unit's functionality. A low battery signal alerts you to replace the battery and end-of-life alarm of three chirps alerts you to replace the unit. Two AA batteries are included. 5-year limited warranty. UL listed. Not available for sale in Massachusetts.--Bree Norlander

What's in the Box
One combination carbon monoxide and smoke alarm, two AA batteries, and user's manual. This does not contain voice feature.

Product guides and documents

Troubleshooting Guide (PDF)
User Manual (PDF)

Top Brand: First Alert

Highly Rated
100K+ customers rate items from this brand highly
Trending
100K+ orders for this brand in past 3 months
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First Alert Powered Alarm SCO5CN Combination Smoke and Carbon Monoxide Detector, Battery Operated, 1 Pack, White
First Alert Powered Alarm SCO5CN Combination Smoke and Carbon Monoxide Detector, Battery Operated, 1 Pack, White
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Price—-5% $104.48
Typical: $110.32		$160.83-27% $32.97
List: $44.99		$34.00-20% $59.95
List: $74.99
Delivery—
Get it as soon as Wednesday, Jul 9
Get it as soon as Wednesday, Jul 9
—
Get it as soon as Wednesday, Jul 9
Get it Jul 17 - 18
Customer Ratings
4.64.6 out of 5 stars30,552
4.64.6 out of 5 stars30,552
4.74.7 out of 5 stars152
4.64.6 out of 5 stars223
4.44.4 out of 5 stars2,380
4.34.3 out of 5 stars21
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Important information

Legal Disclaimer

Products ship Monday, Wednesday, & Saturday. No exceptions. Items purchased with expedite shipping come with tracking. Standard shipping does not require that I get it to you overnight/two days (I do not participate in Amazon Prime, and Standard Shipping does not come with tracking.

Bulb Voltage

120 volts

Customer reviews

4.6 out of 5 stars
30,552 global ratings

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Customers say

Customers find the smoke and carbon monoxide detector easy to install, with detailed instructions and a mounting bracket that makes the process simple. Moreover, they consider it good value for money. However, the product's performance receives mixed feedback - while some say it works well, others report it malfunctioning. Similarly, opinions on quality are divided, with some finding it reliable while others describe it as garbage.

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Ease of installationValue for moneyWorks wellQuality
878 customers mention "Ease of installation"826 positive52 negative

Customers find the smoke and carbon monoxide detector easy to install, with the mounting bracket making the process particularly simple.

"Very easy to install. Just install the base first on the ceiling with a couple of screws and then the detector fits right in on the base...." Read more

"It attaché’s easily." Read more

"Easy to install." Read more

"It was easy to install and seems fine when tested. Hopefully, it will work during an emergency." Read more

493 customers mention "Value for money"452 positive41 negative

Customers find the smoke and carbon monoxide detector to be good value for money.

"great value" Read more

"Quality product at a reasonable price" Read more

"...And that’s the goal, to be safer. It was worth the cost." Read more

"...This is an inexpensive, simple and relatively attractive unit, although I really wish smoke detector companies would put more effort in to beautiful..." Read more

860 customers mention "Works well"596 positive264 negative

Customers have mixed experiences with how the smoke and carbon monoxide detector functions, with some reporting it works well while others mention it malfunctions.

"It was easy to install and seems fine when tested. Hopefully, it will work during an emergency." Read more

"...With its dual protection against smoke and carbon monoxide, reliable performance, battery-operated design, easy installation, and sleek appearance,..." Read more

"Good smoke/CO detector, malfunctioned after a couple years...." Read more

"...It was a 30-second job to put in the batteries & twist it into place. Good job, First Alert!" Read more

780 customers mention "Quality"493 positive287 negative

Customers have mixed opinions about the smoke and carbon monoxide detector's quality, with some finding it reliable while others report it didn't last 3 years and consider it garbage.

"Item was good however the package was open, poor job of attempting to tape it back up. Was worried it was old and used...." Read more

"...The downside of this is that this unit only lasts for approximately 7 years according to the user manual included with the unit...." Read more

"...I appreciate the added reliability and convenience of not having to worry about the detector losing power during emergencies...." Read more

"Quality product at a reasonable price" Read more

Ingenious base plate...works for the same screw placement as my old brand!
5 out of 5 stars
Ingenious base plate...works for the same screw placement as my old brand!
I put off changing my out of date CO/Smoke alarm for months because i didn't want to drill new holes in my ceiling after changing from another brand. These smart folks designed their base plate holes to match exactly to the Kidde one that I had, no need to drill new holes! Woohoo! Thank you for that! Install done in 2 minutes. The little guy wins one! As to its effectiveness, I hope I never need to know. Longevity TBD.
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Top reviews from the United States

  • Brandon
    5.0 out of 5 stars Thank you
    Reviewed in the United States on July 1, 2025
    Size: 1-PackStyle: Precision DetectionPattern Name: SMCO100Verified Purchase
    Why did you pick this product vs others?:
    Keeping my family safe
    One person found this helpful
    Helpful
     Report
  • Amazon Customer
    5.0 out of 5 stars Easy to install
    Reviewed in the United States on May 20, 2025
    Size: 1-PackStyle: Precision DetectionPattern Name: SMCO100Verified Purchase
    Very easy to install. Just install the base first on the ceiling with a couple of screws and then the detector fits right in on the base. When the battery gets low, it gives a warning beeping sound so I know when to change out the battery.
    3 people found this helpful
    Helpful
     Report
  • J. Sroka
    5.0 out of 5 stars Go with replacable batteries.
    Reviewed in the United States on May 25, 2025
    Size: 3-PackStyle: Precision DetectionPattern Name: SMCO100Verified Purchase
    I like these detectors because they use re-replaceable batteries. I replace several 10 year lithium battery detectors that quit after 4 years.
    Helpful
     Report
  • JP
    4.0 out of 5 stars Decent replacement
    Reviewed in the United States on June 19, 2025
    Size: 1-PackStyle: Precision DetectionPattern Name: SMCO100Verified Purchase
    Purchased this due to false alarms on our old detector. We have not encountered any false alarms with this one being placed in close proximity to the kitchen. I liked that it has a pattern for the screws so it’s likely you won’t have to re-mount the screws. The status lights are hard to see to confirm operation. I also feel like the price was expensive but it was comparable to other brands.
    One person found this helpful
    Helpful
     Report
  • tobysunny
    5.0 out of 5 stars Great price!
    Reviewed in the United States on June 1, 2025
    Size: 1-PackStyle: Precision DetectionPattern Name: SMCO100Verified Purchase
    It attaché’s easily.
    Helpful
     Report
  • Elisa Boyas
    5.0 out of 5 stars Smoke alarm
    Reviewed in the United States on June 2, 2025
    Size: 1-PackStyle: Standard DetectionPattern Name: SCO7CNVerified Purchase
    Great
    Helpful
     Report
  • Patel
    5.0 out of 5 stars Value for money
    Reviewed in the United States on May 27, 2025
    Size: 1-PackStyle: Precision DetectionPattern Name: SMCO100Verified Purchase
    Easy to install.
    Helpful
     Report
  • Jim A.
    5.0 out of 5 stars Easy install.
    Reviewed in the United States on May 24, 2025
    Size: 1-PackStyle: Precision DetectionPattern Name: SMCO100Verified Purchase
    I always use First Alert.
    Helpful
     Report

Top reviews from other countries

Translate all reviews to English
  • Shahd
    5.0 out of 5 stars ممتاز
    Reviewed in the United Arab Emirates on November 13, 2024
    Size: 1-PackStyle: Precision DetectionPattern Name: SMCO100Verified Purchase
    منتج رائع وجودة عاليه جدا
    Report
  • Ian K
    5.0 out of 5 stars Impressively loud
    Reviewed in Australia on October 20, 2019
    Size: 1-PackStyle: Standard DetectionPattern Name: SCO7CNVerified Purchase
    Like - Loud, CO detection, easy to install
    Dislike - American accent makes it a bit less intelligible
    Report
  • Geoffrey. Biggins
    5.0 out of 5 stars Five Stars
    Reviewed in the United Kingdom on July 27, 2017
    Size: 1-PackStyle: Standard DetectionPattern Name: SCO7CNVerified Purchase
    Great
    One person found this helpful
     Report
  • mel
    5.0 out of 5 stars Quality and ease of use
    Reviewed in the United Kingdom on May 11, 2025
    Size: 1-PackStyle: Standard DetectionPattern Name: SCO5CNVerified Purchase
    Easy to fit excellent delivery fantastic quality
    Report
  • Amazon Customer
    5.0 out of 5 stars Smoke alarm.
    Reviewed in the United Kingdom on June 3, 2024
    Size: 1-PackStyle: Standard DetectionPattern Name: SCO5CNVerified Purchase
    Very happy with the product. Just the correct size to fit the previous fitting.
    Report