First Alert Combination Smoke & Carbon Monoxide Alarm, Battery Operated Detector with Test & Silence Button, SMICO100, 1-Pack
Original price was: $44.99.$40.95Current price is: $40.95.
Price: $44.99 - $40.95
(as of Oct 09, 2025 20:50:08 UTC – Details)
The First Alert SMICO100 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.
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
End-of-life warning lets you know when it’s time to replace the alarm
Battery-operated alarm allows for easy installation and maintenance
Test/silence button for efficient testing to ensure alarm is working properly
Customers say
Customers find the smoke and carbon monoxide detector to be of good quality and easy to install, appreciating its value for money. However, the functionality and battery life receive mixed reviews – while some say it works properly and has a ten-year battery, others report it stops working and note issues with the 9V battery operation. Moreover, the chirp frequency is problematic, with customers reporting that it continues to beep and chirps after only a few hours of use. Additionally, the product lacks necessary wiring connectors.
11 reviews for First Alert Combination Smoke & Carbon Monoxide Alarm, Battery Operated Detector with Test & Silence Button, SMICO100, 1-Pack
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Original price was: $44.99.$40.95Current price is: $40.95.
ShastaLynne –
Just what I needed in a smoke detector
First Alert is the best company for smoke detectors. We had our house inspected and were told that we should have smoke and carbon monoxide detectors outside all of the bathrooms. I had mistakenly replaced them with some that didn’t have the carbon monoxide detector, so I ordered these. They arrived quickly and were easy to replace. Installation was super easy. Typically I change the battery every 2-3 years as they are long lasting. They don’t go out before then. It’s easy to see if they are working with the colored dot. They are loud as you’d expect for a smoke detector. I only buy First Alert as they are the best in quality.
Paul –
Very Reliable Alarm And Value
Very reliable and dependable alarm at a great value. Easy to install, long battery life. Seems to be very sensitive sensors (which is a good thing), as just very little smoke from cooking can set it off. Loud enough to wake anyone up. Warning beep alerts when battery is low. We use these in our home, and our rental properties. High quality from a name brand at a fair price.SLEEP EASY WITH PEACE OF MIND.
andy Menzl –
Easy to use?
Works well
Creekside Arbour –
they work
only one issue, the CO side goes off if sewer gas is detected…. strange
D. Johnson –
Easy install
Easy install. Plugged into the existing wiring
Michael –
Buyer beware: These do not come with a connection to plug in
Over priced trash, has the spot to plug in but there’s no prongs to connect the cable. Why would I spent this much money and not be able to plug it in?? I can get a much cheaper model if I just want battery powered.
Alexandra –
So far so good
I purchased two of these to replace a different battery operated brand that was apparently discontinued and their ten year âno hassleâ one had bad reviews. Thanks to their multiple hole bracket, I didnât have to drill new holes to install them and thereâs a side door to easily access the battery, which is supplied with the unit. Itâs also a Duracell, which is a plus.
byron –
no problems with installation , It took more time to get my step stool than trading out alarms
Very easy to install, Everything needed was supplied
Irena Gyorio –
Very satisfied
Janet Succamore –
Bought for obvious safety, works when something has happened, when cooking.
Steve –
Tres bien