DOWNLOAD THE APP
Customer Services
Copyright © 2025 Desertcart Holdings Limited
DOWNLOAD THE APP
🔥 Stay ahead of danger with smart, seamless protection! 🔥
The First Alert BRK SMI100-AC 6-pack hardwired smoke detectors combine reliable 120V AC power with 9V battery backup to ensure continuous operation during outages. Featuring ionization sensors for fast flaming fire detection, these alarms interconnect up to 18 units for whole-home coverage. Designed for easy installation with tamper-resistant locking pins and a single button for silence/test, they deliver trusted, maintenance-free safety backed by a 10-year limited warranty.
| ASIN | B07B4CGQLT |
| Alarm | Audible |
| Batteries | 1 9V batteries required. (included) |
| Batteries Included? | Yes |
| Batteries Required? | Yes |
| Battery Cell Type | Alkaline |
| Best Sellers Rank | #1,932 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #10 in Smoke Detectors & Fire Alarms |
| Brand | First Alert |
| Certification | not_applicable |
| Color | White |
| Compatible Devices | smoke alarms |
| Customer Reviews | 4.7 4.7 out of 5 stars (966) |
| Date First Available | March 1, 2018 |
| Included Components | 9-volt battery (6), First Alert BRK 9120B Hardwired Smoke Alarms with Battery Backup (6), Mounting brackets with hardware (6) |
| Item Package Quantity | 1 |
| Item Weight | 9.6 ounces |
| Item model number | 9120B |
| Manufacturer | First Alert |
| Number of Items | 6 |
| Operating Humidity | 10-95% RH |
| Part Number | 9120BFF-6 |
| Power Source | Battery Powered |
| Product Dimensions | 2.2"D x 5.6"W x 5.6"H |
| Sensor Type | Ionization |
| Style | Hardwired |
| UPC | 029054019387 029054019226 |
A**R
Safety
Great purchase. Easy to install and replace the old smoke & carbon detectors. The 6 pack was enough to replace all of my detectors.
T**H
Smoke detector
Installed these across our home and feel so much safer. The hardwired setup with battery backup is exactly what we needed. They’re reliable, easy to install, and the interconnect feature ensures we’re alerted no matter where the issue is. Peace of mind in a box!
J**S
Great
These worked great to replace some older FireX detectors. They screwed right into the existing locations, and with the adapter harnesses it was all plug and play. Replaced 10 detectors in less that 30 minutes.
N**N
Replacement for existing smoke detectors
Bought these to replace my 5 year old hard wired smoke detectors. Easy to install. Could use the existing mount with no problems in installing on mount. Change battery annually. The brand is the same as the one I replaced which was a good smoke detector. Affordable smoke detectors that last about 5 years. Highly recommended.
A**R
Replacement alarms
Great alarms for a great price. Easy to install and link together perfectly.
M**S
Smoke alarms
Now installed and workng fine.
M**S
Replaced all six of mine in less than an hour.
The six pack is a bargain. Wiring is easy, but you can buy plug in adapters.
L**E
Smoke detectors
Easy replacement for our original smoke detectors. Fit perfectly.
Trustpilot
1 month ago
3 weeks ago