This item is out of stock.

First Alert SC9120B Carbon Monoxide Smoke Alarm AC Power Hardwired Battery Bac

US $53.09
Was US $58.99 (10% off)What does this price mean?
Recent sales price provided by the seller
or 4 interest-free payments of $13.27 available with
Condition:
New
Ended: Jul 14, 2025 08:28:54 PDT
Out of Stock46 sold
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Located in: Bryant, Arkansas, United States
Delivery:
Estimated between Thu, Jul 3 and Wed, Jul 9 to 94104
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eBay item number:197108012885
Last updated on Jun 06, 2025 10:40:05 PDTView all revisionsView all revisions

Item specifics

Condition
New: A brand-new, unused, unopened, undamaged item in its original packaging (where packaging is ...
Battery Included
Yes
Manufacturer Warranty
10 Years
Country/Region of Manufacture
Mexico
Operating Sound Rating
90 dB
UPC
0029054513069
Power Source
Corded Electric
Color
White
Item Diameter
6 in
MPN
SC9120B
Item Depth
2 in
Smart Home Compatibility
Apple HomeKit
Brand
First Alert
Type
Smoke Alarm
Number of Batteries
1
Model
BRK SC9120B
Features
Battery Backup
Smart Home Protocol
Wi-Fi
Item Width
5.6in.
Item Weight
0.25lbs.

About this product

Product Identifiers

Brand
First Alert
MPN
SC9120B
GTIN
0029054513069
UPC
0029054513069
Model
BRK SC9120B
eBay Product ID (ePID)
1303640064

Product Key Features

Power Source
Corded Electric
Color
White
Item Depth
2 in
Smart Home Compatibility
Apple HomeKit
Number of Batteries
1
Features
Battery Backup
Type
Smoke Alarm
Smart Home Protocol
Wi-Fi

Dimensions

Item Width
5.6in.
Item Diameter
6 in
Item Weight
0.25lbs.

Additional Product Features

Battery Included
Yes

Item description from the seller

About this seller

Tech Stuff and More

98.9% positive feedback11K items sold

Joined Aug 2005
Usually responds within 24 hours

Detailed seller ratings

Average for the last 12 months
Accurate description
4.9
Reasonable shipping cost
5.0
Shipping speed
4.9
Communication
5.0

Popular categories from this store

Seller feedback (1,438)

All ratings
Positive
Neutral
Negative
  • *****- Feedback left by buyer.
    Past 6 months
    Verified purchase
    Fast shipper and great product. Seems to be well made and in new condition. It was a great value and looks great.
  • *****- Feedback left by buyer.
    Past month
    Verified purchase
    Perfect replacement for my needs, quick delivery and great price.
  • *****- Feedback left by buyer.
    Past 6 months
    Verified purchase
    Fast shipping and packaged well. Thank you
See all feedback

Product ratings and reviews

4.8
329 product ratings
  • 291 users rated this 5 out of 5 stars
  • 26 users rated this 4 out of 5 stars
  • 7 users rated this 3 out of 5 stars
  • 1 users rated this 2 out of 5 stars
  • 4 users rated this 1 out of 5 stars

Would recommend

Good value

Good quality

Most relevant reviews

  • Top favorable review

    Great guarantee from factory

    My home builder installed these types of detectors when he built the house 8 years ago. I've had several go bad or simply reach the end of their service life according to the "chirp code" and the company replaced them free without any argument or even proof that I bought or owned them. The original detectors were guaranteed for 7 years, I think, and now the warrantee has expired on all of them. I bought this one as a standby replacement when another one goes on the fritz in the future. These are the exact same model and the new unit plugs into the existing base and turns in without having to replace the old base which makes replacement easier. Other than having to replace a few of these under warrantee, I think they have worked well and recommend them as a good detector.

    Verified purchase: YesCondition: NewSold by: freeway33

  • Top critical review

    Replaced a similar First Alert Combination Alarm

    Using it to replace a similar item that failed. I can't evaluate it by the star system. When reattached to the the wall connection and pressing the test button everything checked out. So it works as it should. If it continues to work for seven plus years I'll be happy.

    Verified purchase: YesCondition: NewSold by: electricvoltage26

  • good smoke co detectors

    had this type in my house before and they have a 10 year life span so replaced again was easy where just had to plug in. was pleased that they actually came with good duracell batteries good value for peace of mind

    Verified purchase: YesCondition: NewSold by: dealsonwings

  • Absolutely love these things. Kills two birds with one stone per say!

    These units are obviously great quality as expected from BRK & First Alert. Having hardwired units is the only way to go. These have the combo Smoke & o2 sensor/alarms. They come with a dust cover/bonnet as you will see in my first picture. Great for when doing any remodeling. Keeps dust out so as not to damage the sensors. I even recommend holding on to these in case you need them after initial install! Easy as pie to install and so far have operated flawless. I highly recommend these units and purchasing them in a multi-pack here rather than in store. Way cheaper this way. Great Quality, Great Value. They are a must in our house for safeguarding my family for sure!

    Verified purchase: YesCondition: NewSold by: abetterservicecolarrycannon

  • great features and great price

    An awesome product to add extra protection around your home. Great value and willing to make additional purchases

    Verified purchase: YesCondition: NewSold by: rcrcrbld-8

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