




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
8 reviews for First Alert Combination Smoke & Carbon Monoxide Alarm, Battery Operated Detector with Test & Silence Button, SMICO100, 1-Pack
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$39.99

Milo 4141 –
We’re safe and secure now.
It was so easy to install these in our camper. I also love the fact that they are both smoke and co2 detectors. The camper has a gas stove and gas heater. They have a 5 year lifespan because of the co2. Now we feel safe and are ready to go camping.
Bud de Laurier –
First Alert 🔥 Detector
This is the best detector with CO on the market. Easy install and excellent battery life.
orion1113 –
OEM replacement
It works fine so far.It is easy to install and connects to the other detectors quickly.
REKnight –
Great replacements for my old ones
This three pack of Fist Alert Smoke and Carbon Monoxide detectors was perfect for what I needed. I replaced three battery built-in and therefore not serviceable detectors with these which will make them easier to service, especially since I can replace the batteries and they now have built-in fault detection to alert the owner to a faulty detector. It was easy to replace the old detectors as the new ones used the same holes for the mount as the old ones. Remove the battery tab, test and install.
Amazon Customer –
combo detector
Item ask described. They work perfectly.
Bret –
Beware: connectors are different from old model
Why did you pick this product vs others?:I had the same model already in the house so I assumed the new ones would fit with no problem. I was soooo wrong, when I got them I saw the connectors are different which makes no sense if you are replacing the same model. If they changed the way it connects they should put the new type of connectors in the box or mention that the old version can’t connect to the new one. So if you want to install you need to buy those separately which is ridiculous.
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.
Amazon Customer –
Worked
Price seems highs, but it worked and communicated with the other detectors.