BRK First Alert 9120BFF/ SMI100-AC Smoke Detector, Hardwired Alarm with Battery Backup, White, 1-Pack
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BRK First Alert 9120BFF/ SMI100-AC Smoke Detector, Hardwired Alarm with Battery Backup, White, 1-Pack

4.6/5
Product ID: 10703157
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Details

  • Brand
    First Alert
  • Style
    9120BFF
  • Power Source
    Battery
  • Color
    White
  • Product Dimensions
    5.6"D x 5.6"W
  • Item Weight
    0.05 Pounds
🔊85dB Alarm
🔋Battery Backup
đź”—Interconnectivity

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Description

🚨 Safety First, Always!

  • TRUSTED SAFETY - First Alert: The pioneer in home safety since 1958.
  • SWIFT DETECTION - Ionization sensor for rapid response to fast-flaming fires.
  • SEAMLESS INTEGRATION - Connects with other First Alert devices for comprehensive safety.
  • USER FRIENDLY DESIGN - Single test/silence button and easy installation for hassle-free setup.
  • STAY ALERT STAY SAFE - Hardwired with battery backup for uninterrupted protection.

The BRK First Alert 9120BFF Smoke Detector is a hardwired alarm featuring a reliable battery backup, ensuring constant monitoring even during power outages. With an ionization sensor for quick detection of fast-flaming fires and an 85 decibel alarm, this device is designed for maximum safety. It easily connects with other compatible smoke detectors, making it a vital addition to any home. Installation is straightforward, and it meets rigorous UL standards, backed by First Alert's legacy of trust in home safety.

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Specifications

BrandFirst Alert
Style9120BFF
Power SourceBattery Powered
ColorWhite
Product Dimensions5.6"D x 5.6"W x 2.2"H
Item Weight0.05 Pounds
AlarmAudible
Sensor TypeIonization
Global Trade Identification Number00029054015327
Number of Items1
ManufacturerFirst Alert
UPC029054015327
Part Number9120BFF
Item Weight0.8 ounces
Item model number9120B
Batteries1 9V batteries required. (included)
Is Discontinued By ManufacturerNo
Size1-Pack
PatternFilter
Voltage120 Volts
Item Package Quantity1
Number Of Pieces1
Type of BulbLED
Cutting Diameter5.6 Inches
Included Componentssmoke detector, batteries, mount
Batteries Included?Yes
Batteries Required?Yes
Battery Cell TypeAlkaline
Warranty Description10 Year Limited
Assembled Diameter5.6 Inches

Have a Question? See What Others Asked

How do you silence this alarm? Apparently the low battery notification only starts after midnight and WILL NOT STOP unless you have another battery.
Can a BRK Model 92120B smoke detector directly plug in and replace an old BRK Model 4120B smoke detector (without an adapter)
can these be connected together so if one is set off they all go off?
My entire home is equipped with BRK smoke detector (4120 B) and Carbon Monox Det (CO50120B). They need replacing. Will new BRK fit extant casings?

Reviews

4.6

All from verified purchases

S**R

Replace Your Smoke Detectors after 8 to10 years!

My smoke detector and secure sensors all seem to have batteries go out in the middle of the night when I'm asleep. Two weeks ago the smoke detector went off with a low battery beep and nothing including Changing the battery would stop the beeps. After googling the brand i found out that after a max of 10 years the detector is no good and it will beep to let you know it needs replacement. I found this exact model on Amazon. It was an easy and quick replacement. It even came with a new battery. If your smoke detector have been around for awhile don't wait until they wake you up in the middle of the night. Start replacing them now!

M**.

Excellent Replacement for Old Smoke Detectors

I researched various brands of smoke detectors and decided based on reviews and other factors (UL ratings) that the First Alert / BRK brand was the best and most reliable. I also read about ionization vs photoelectric sensors, and that many different websites recommend having a smoke detector that has both types of sensors installed in a single unit to alert to both types of common house fires (smoldering vs rapid flame combustion). I found the First Alert model smoke detector with both ionization and photoelectric sensors would not work in my application, as the combination sensor smoke detector is battery powered only. The smoke detector configuration in my home is hard wired. So I decided to purchase the First Alert Model SMI 100-AC, which has the ionization type sensor only, and is equipped to be hard wired and has 9 volt battery backup. The smoke detectors I was replacing were USI brand and the old pigtail was not compatible with the First Alert brand. So all 7 of my smoke detectors needed the new hire wire pigtail installed that comes with the First Alert detector. I found this job to be very easy and instructions for installation were very straightforward. Took me a total of about 2.5 hours to rewire all pigtails and install all 7 new detectors. I tested each new detector individually as each was installed, and then again as an interconnected series across the complete circuit. All worked perfectly and all are showing solid green LED, which indicates they are all receiving AC power and alarm and battery backup are working and active. The green LED light is very subtle and does not cast any light at all in a dark room that would be considered bothersome or glaring. Very happy with my choice and I highly recommend to anyone needing to install new smoke detectors or replace old ones that have reached end of life like mine.

M**S

Ease of integrating into your old system.

These smoke detectors are the exact replacement for our 20-year-old malfunctioning alarms. They are the same brand, and we only had to replace the base plate. The "pigtails" were also the exact same and included in the package, but we were able to use the original ones so it was easy to just replace the baseplate then plugin the pigtail and apply the new smoke alarm then test. All 4 alarms were then communicating when pushing the test button. Would recommend!!

G**K

Tight pins

Very difficult to line up pins, very snug, hard to insert into prior female ending of electrical connection.

M**W

Delivered quickly and worked as advertised.

Item was delivered quickly and worked as advertised. It was not the lowest price, but it had the most complete description, so I knew it would fit in an existing mounting.I really like getting things right the first time with the right part.

E**A

Quality product.

The right replacement for the original smoke alarm. When you test function, it activates smoke and carbon mono oxide alarm as well.

S**L

Wired smoke detector replacement.

The smoke detectors in my house are 20+ years old and malfunctioning. This unit works great as a replacement.

M**R

First alert

Easy to install and works exactly as it should

Common Questions

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TrustScore 4.5 | 7,300+ reviews

Ali H.

Fast shipping and excellent packaging. The Leatherman tool feels very premium and sturdy.

1 day ago

Ayesha M.

The product exactly matches the description. Very satisfied with my purchase.

5 days ago

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Ali H.

Fast shipping and excellent packaging. The Leatherman tool feels very premium and sturdy.

1 day ago

Fatima A.

Best international shipping I've ever tried. Worth every penny!

3 days ago

Brk First Alert 9120bff Smi100 Ac Smoke Detector Hardwired Alarm | Desertcart GB