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FIRST ALERT

First Alert SMCO100 Battery-Operated Combination Smoke & Carbon Monoxide Alarm, 1-Pack

    • Based on 30,482 reviews
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Availability: In Stock.
Fulfilled by Amazon
Arrives Monday, May 5
Order within 20 hours and 44 minutes
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Size: 1-Pack


Style: Precision Detection


Pattern Name: SMCO100


Features

  • First Alert's Precision Detection advanced sensing technology complies with new industry standards to reduce cooking nuisance alarms and provides early warning in the event of a home fire emergency
  • Provides reliable 2-in-1 protection against both smoke and carbon monoxide
  • Battery-operated alarm allows for easy installation and maintenance
  • Test/silence button for efficient testing to ensure alarm is working properly
  • End-of-life warning lets you know when its time to replace the alarm

Description

The First Alert SMCO100 Battery-Operated Combination Smoke & Carbon Monoxide Alarm is equipped with First Alert's Precision Detection advanced sensing technology and meets new industry standards. This 2-in-1 smoke and carbon monoxide alarm provides reliable protection against both threats and is easy to install and maintain.

Brand: FIRST ALERT


Style: Precision Detection


Power Source: Battery Powered


Color: White


Item Weight: 8.24 ounces


Alarm: Smoke, CO


Sensor Type: Photoelectric


Global Trade Identification Number: 66


Number of Items: 1


Manufacturer: Resideo


Brand: ‎FIRST ALERT


Style: ‎Precision Detection


Power Source: ‎Battery Powered


Color: ‎White


Item Weight: ‎8.24 ounces


Alarm: ‎Smoke, CO


Sensor Type: ‎Photoelectric


Global Trade Identification Number: ‎66


Number of Items: ‎1


Manufacturer: ‎Resideo


UPC: ‎029054022066


Part Number: ‎1046776


Item Weight: ‎8.2 ounces


Product Dimensions: ‎3.21 x 6.75 x 8.5 inches


Country of Origin: ‎Mexico


Item model number: ‎SMCO100


Batteries: ‎2 AA batteries required. (included)


Size: ‎1-Pack


Pattern: ‎SMCO100


Item Package Quantity: ‎1


Included Components: ‎AA Batteries


Batteries Included?: ‎Yes


Batteries Required?: ‎Yes


Battery Cell Type: ‎Alkaline


Warranty Description: ‎10 Years Limited


Date First Available: October 10, 2023


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Monday, May 5

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

    • Good Unit, Well Known Brand
Size: 1-Pack Style: Standard Detection Pattern Name: SCO5CN
I really like that this smoke detector includes Carbon Monoxide (CO) detection with it. The upside of this is that in replacing an old smoke detector, I now have extra protection against CO leaks. The downside of this is that this unit only lasts for approximately 7 years according to the user manual included with the unit. At roughly 7 years (which I assume is roughly as the unit does not have a precise time keeping setup), the detector will beep at your continuously until you replace it. Note that according to the user manual, you can silence this "End of Life" alarm for 2 days by pressing the button on the unit. So, you could continue using it so long as you tell it to be quiet every two days by pushing its buttons (pun intended). However, the "End of Life" alarm exists for a reason, and as many reviewers (and question answerers) on Amazon have noted, the CO detection functionality will have deteriorated such that you really need a new alarm. The quality of the unit seems good. It is made out of plastic, but seemly high quality and durable plastic. There is a mounting plate (also plastic) that you screw into a wall or ceiling and then the detector unit goes into that mounting plate and locks with a quarter turn. The test alarm sounds loud (which is a good thing for deep sleepers), and the use of AA batteries is a refreshing change. I hated buying 9V batteries just for the smoke detector. It is important to note that I did not evaluate the sensitivity of the CO detector nor experienced a smoky fire (or any fire), so this review assumes both of those listed functions would work properly. Also, I have only owned the product for ~ 1 month so I cannot comment on the reliability or lifespan of its operation. I can testify that I replaced a 30+ year old First Alert smoke detector that was (as far as I know from burning things in the kitchen) still working so I do have high confidence in their brand. I only replaced the old detector for a combination of two reasons: (1) I wanted CO detection and (2) the old one's plastic was yellowing. I think it is also important to point out (although it is well mentioned in the product page) that this detector is NOT for new-er construction homes that have interconnected smoke detectors (i.e. if your smoke detector has a plug in the ceiling that it plugs into). ... show more
Reviewed in the United States on June 23, 2018 by Mike
    • Essential Safety Solution: First Alert Powered Alarm SCO5CN
Size: 1-Pack Style: Standard Detection Pattern Name: SCO5CN
⭐⭐⭐⭐⭐ The First Alert Powered Alarm SCO5CN has become an integral part of my home's safety system, providing reliable protection against both smoke and carbon monoxide. Here's why I give it a solid 5-star rating: Dual Protection: This combination smoke and carbon monoxide detector offers peace of mind by safeguarding my family and home against two common household hazards. With one device, I have comprehensive protection against both smoke from fires and carbon monoxide leaks. Reliable Performance: First Alert is a trusted name in home safety, and the SCO5CN lives up to the brand's reputation for reliability. It detects smoke and carbon monoxide quickly and accurately, emitting loud alarms to alert occupants in case of an emergency. Battery Operated: The battery-operated design ensures continuous protection even during power outages. I appreciate the added reliability and convenience of not having to worry about the detector losing power during emergencies. Easy Installation: Installing the SCO5CN is a breeze. With no wiring required, I was able to mount it in minutes using the included mounting bracket and screws. The simple setup process means I can quickly and easily enhance the safety of my home without any hassle. Sleek Design: The sleek, white design of the SCO5CN blends seamlessly with my home decor. Its low-profile design and compact size make it unobtrusive while still providing essential protection. In conclusion, the First Alert Powered Alarm SCO5CN is an essential safety device for any home. With its dual protection against smoke and carbon monoxide, reliable performance, battery-operated design, easy installation, and sleek appearance, it offers everything I need to keep my family and home safe. Highly recommended! 🏠🔥🚨 ... show more
Reviewed in the United States on February 10, 2024 by Eric
    • So far, so good!
Size: 1-Pack Style: Standard Detection Pattern Name: SCO5CN
I had a $120 Google Nest Protect previously and it malfunctioned and I believe requires a good wifi connection to really work properly. I wanted something simple and reliable so switched to the this First Protect. So far so good. No false alarms yet and installation was straightforward. They even included drywall anchors, something that was not even included with the Nest Protect. Just drill a 3/16 hole and then lightly hammer the drywall anchors in, then screw the mounting bracket in to the anchors using a phillips screwdriver. You can also rotate the First Alert in it's mounting bracket so that the words line up exactly how you like them. No one likes a smoke detector mounted on the wall with the lettering skewed or upside down. You do not have to screw the unit on the mount all the way in order for it to be secure. The features are simple and to the point, just write down in your smartphone or wherever what the different beeps mean because you will probably forget later on. There are only a few different beep sequences so it's not overly complicated but you will want to know for example when it's telling you the battery needs replacement vs. when it's at the end of it's life cycle. This is an inexpensive, simple and relatively attractive unit, although I really wish smoke detector companies would put more effort in to beautiful designs. That's one of the things I like better about the Nest Protect. ... show more
Reviewed in the United States on October 22, 2020 by Mediahound 🎧
    • Seems good
Size: 1-Pack Style: Precision Detection Pattern Name: SMCO100
It was easy to install and seems fine when tested. Hopefully, it will work during an emergency.
Reviewed in the United States on March 23, 2025 by Lauren
    • Great product
Size: 1-Pack Style: Standard Detection Pattern Name: SCO7CN
These are easy to set up. Love the fact they are not so sensitive they go off with normal cooking like one we had. Yet they are loud enough to alert you to any problems and will tell you when they need to be discarded and a new one put up.
Reviewed in the United States on December 27, 2024 by John E. Boggs
    • good value
Size: 1-Pack Style: Standard Detection Pattern Name: SCO5CN
Received as promised
Reviewed in the United States on April 19, 2025 by Curtis Peck

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