🚨 Stay safe, stay savvy—smoke detection that works as hard as you do!
The First Alert SMI100 is a battery-powered smoke alarm featuring advanced Precision Detection technology to reduce false alarms and provide early fire warnings. It offers easy installation with a front-access battery compartment, includes a test/silence button for quick checks, and signals when it’s time for replacement, ensuring reliable home safety with minimal hassle.
| Brand | First Alert |
| Style | Precision Detection |
| Power Source | Battery Powered |
| Color | White |
| Product Dimensions | 5.4"D x 5.4"W x 1.9"H |
| Item Weight | 11.2 ounces |
| Alarm | Smoke Alarm |
| Sensor Type | Ionization |
| Number of Items | 1 |
| Manufacturer | Resideo |
| UPC | 029054022387 |
| Item model number | SMI100 |
| Size | 1-Pack |
| Pattern | SMI100 |
| Item Package Quantity | 1 |
| Included Components | 9V Alkaline Battery |
| Batteries Included? | Yes |
| Batteries Required? | Yes |
| Battery Cell Type | Alkaline |
A**A
Easy to Install and Works Great
I needed a replacement for an old smoke alarm that stopped working, and this First Alert model was a perfect choice. Installation was quick and easy—I was even able to use the same screws from the previous unit, which made the whole process hassle-free.The alarm is compact, has a clean look, and the test and silence button is a nice feature for peace of mind. Battery-operated and ready to go right out of the box, it started working immediately after installation.Great value for a reliable, no-fuss smoke detector. Definitely recommend it if you're looking for a simple and effective replacement!
B**F
Tried and true battery smoke detectors
My original (over 20 years old) hard-wired smoke detectors started beeping a lot in the middle of the night. Never during the day! I did not want hard-wired smoke detectors any longer, so I opted for these tried and true battery smoke detectors. Super easy install. Tests great. Wife burned a piece of toast in kitchen and both smoke detectors (one located about 25 feet away and the other about 40 feet) worked as they should! There was barely any smoke if at all, but you could definitely smell that burnt toast aroma.
D**D
Reliable and cheap
Works exactly as advertised. I use these frequently across multiple properties. They're easy to install, very reliable, and cost-effective. Great value for the price. I highly recommend to anyone needing a simple and dependable solution.
A**R
Sensitive
Works a little to well had to move the toaster it kept going off every I made toast
W**
Very easy to install and change battery
Very easy to mount as well as remove battery when it’s time to replace. They look clean and sit flush to the wall perfectly. They are small enough to fit over my door frame. Good quality, would recommend!
L**N
Its a smoke detector
It works. Convenient for the kitchen where one is needed but he cheap builder did not install one...
D**R
Best price, will buy again!
Best price, will buy again!
G**Y
Battery smoke alarms are not affected by power surges ,also easy installation .
I have used these exclusively in my home and they will alarm as advertised . They also give off warning beeps when the battery gets low on charge. Battery included with these smoke alarms. I have one wired smoke alarm but power surges have damaged the wired 120v unit in the past so the battery models are not affected by power surges . Batteries will last about 18 months . Most people die in house fires from smoke so smoke alarms are very cheap insurance to awaken you at the slightest hint of smoke giving you time to escape .
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