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First Alert Combination Smoke & Carbon Monoxide Alarm, Battery Operated Detector with Test & Silence Button, SMCO100, 1-Pack,White

  • Based on 28,033 reviews
Condition: New
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Availability: In Stock.
Fulfilled by Amazon

Arrives Thursday, Jun 18
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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


Product Dimensions: 5.6"D x 5.6"W x 1.9"H


Item Weight: 0.52 Pounds


Alarm: Smoke, CO


Sensor Type: Photoelectric


Global Trade Identification Number: 66


Unit Count: 1.0 Count


Power Source: Battery Powered


Alarm: Smoke, CO


Sensor Type: Photoelectric


Product Style: Precision Detection


Color: White


Item Dimensions D x W x H: 5.6"D x 5.6"W x 1.9"H


Item Weight: 0.52 Pounds


Brand: First Alert


Model Number: SMCO100


Global Trade Identification Number: 66


Manufacturer Warranty Description: 10 Years Limited


Number of Items: 1


Manufacturer: Resideo


UPC: 029054022066


Mfr Part Number: 1046776


Unit Count: 1.0 Count


Item Type Name: Combination Alarm


Built-In Media: AA Batteries


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Thursday, Jun 18

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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Leasing options through Acima may also be available during checkout.

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Top Amazon Reviews


  • Safety first
Size: 3-Pack Style: Precision Detection Pattern Name: SMCO100
They are very easy to install and seem to work.
Reviewed in the United States on May 28, 2026 by 16Paws

  • No complaints
Size: 1-Pack Style: Precision Detection Pattern Name: SMCO100
Exactly as described! No problems installing or mounting.
Reviewed in the United States on May 21, 2026 by Joshua

  • Works as designed
Size: 1-Pack Style: Precision Detection Pattern Name: SMCO100
Put the batteries in and its done.....
Reviewed in the United States on May 20, 2026 by TommieT

  • High Quality
Size: 3-Pack Style: Precision Detection Pattern Name: SMCO100
These word well. I needed to update my current smoke detectors to combo Co2 smoke detectors
Reviewed in the United States on June 3, 2026 by Susan

  • Fine product
Size: 1-Pack Style: Precision Detection Pattern Name: SMCO100
Works as advertised
Reviewed in the United States on May 28, 2026 by Art A.

  • price went way up
Size: 1-Pack Style: Precision Detection Pattern Name: SMCO100
so far so good price went up $12 since I bought it wow
Reviewed in the United States on June 6, 2026 by Wendy Leonhardt

  • No waking up in the middle of the night to false alarms now.
Size: 3-Pack Style: Precision Detection Pattern Name: SMCO100
These were easy to install, and we haven’t had a false alarm even once. Why did we live with the problem so long!
Reviewed in the United States on May 18, 2026 by Amazon Customer

  • As expected.
Size: 1-Pack Style: Precision Detection Pattern Name: SMCO100
As expected.
Reviewed in the United States on May 18, 2026 by Loren L. England

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