First Alert SMI105-AC, Interconnect Hardwire Smoke Alarm with 10-Year Battery Backup, 1-Pack
Details
- BrandFirst Alert
- StylePrecision
- Power SourceBattery
- ColorWhite
- Product Dimensions5.6"D x 5.6"W
- Item Weight11.2 ounces
Description
⚡ Stay ahead of danger with smart, seamless smoke detection!
- VISUAL ALARM ID - Clear alarm indicator pinpoints the exact unit triggering the alert, speeding up your response time.
- SMART INTERCONNECT - When one alarm sounds, all compatible alarms alert you simultaneously for instant whole-home awareness.
- PRECISION DETECTION - Advanced sensing technology reduces false alarms from cooking, so you only get alerted when it truly matters.
- END OF LIFE REMINDER - Built-in warning signals when it’s time to replace the alarm, so you never compromise on safety.
- UNINTERRUPTED SAFETY - 10-year lithium battery backup ensures continuous protection even during power outages—no more dead battery worries.
The First Alert SMI105-AC smoke alarm features advanced Precision Detection technology to minimize nuisance alerts, a 10-year lithium battery backup for reliable power, and interconnect capability that triggers all compatible alarms simultaneously. Its visual alarm indicator and end-of-life warning ensure you’re always informed and protected.
Specifications
| Brand | First Alert |
| Style | Precision Detection |
| Power Source | Battery Powered |
| Color | White |
| Product Dimensions | 5.6"D x 5.6"W x 2"H |
| Item Weight | 11.2 ounces |
| Alarm | Smoke |
| Sensor Type | Ionization |
| Number of Items | 1 |
| Manufacturer | Resideo |
| UPC | 029054022615 |
| Part Number | SMI105-AC |
| Item model number | SMI105-AC |
| Batteries | 1 9V batteries required. (included) |
| Size | 1-Pack |
| Pattern | SMI105-AC |
| Item Package Quantity | 1 |
| Included Components | Easy Adapter Plug |
| Batteries Included? | Yes |
| Batteries Required? | Yes |
| Battery Cell Type | Lithium |
Reviews
H**1
Smoke alarm
The smoke alarm was not one that would work for in-house wiring otherwise it is fine.and I have set it up as a stand alone smoke alarm.
N**N
Hardwire
I bought by mistake thinking it's battery operated. It was my mistake as the ad clearly stated this. The company was very cool about it and gave me a refund. Thanks!
F**E
Nice
Works well.
M**L
Review
Works as advertised.
B**N
Works well
The 10 year battery is great. Don't have to change batteries twice a year. Works well
B**Y
Great detectors!
These were easy to connect to each other and easy to install! They were a great value especially compared to the other ones! Quality appears good. Tested them out and everything functions as it should. No issues with alarms going off for no reason. They should keep everyone safe, which was our main concern! I would buy these again!
D**R
Exact Replacement for Older First Alert. Smoke Detectors
I bought these to replace two old smoke detectors that were hard wired. The I installed the new base. The existing plug fit perfectly. I tested them to make sure when one alerted, the other one would alert as well. Worked as expected.
K**D
Great replacement for the 9120
When our home was built in 2016, the installed 6 First Alert # 9120's. One of the failed this month. I ordered 6 First Alert # SMI105-AC's as replacements, as they came with a ten year battery.Installation was quick as I only needed to twist, unplug the old ones, then snap these in. Both the mounting bases & wiring was identical. These also have a strong GREEN LED light to indicate the are functioning which is very easy to see, especially at night. (Had no idea which one of the old ones had failed so at 4 am I was climbing up the ladder the check each one until I found the culprit!)Very satisfied.
Common Questions
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