




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, 3-Pack
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$112.98

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.
bill gilmore –
Good product
Good value I’ve had several for many years. They work well. I write on them when they’re installed with a sharpie and change them out as recommended.
Bud de Laurier –
First Alert 🔥 Detector
This is the best detector with CO on the market. Easy install and excellent battery life.
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.
orion1113 –
OEM replacement
It works fine so far.It is easy to install and connects to the other detectors quickly.
Jay Feltes –
It is NOT a direct replacement.
I copy and pasted two reviews already posted because both are true.Device may be great but the package did not include connectors. These do not fit the device they are replacing, don’t know why the proper connectors are not included.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.
bmorton73 –
Replaced my older detectors
Purchases these as replacements for older ones installed when I built my house in order to keep up to code. Thankfully I could just unplug the old ones and put the new ones up without having to make modifications
J Adams –
Value for the money
Received as described I have not used it yet