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BRK First Alert 9120B Smoke Detector AC Powered Battery Back-Up 2-Pack MAY2024

Gazelle-Intensity
(1423)
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US $48.11
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Condition:
New
Out of Stock2 sold
Shipping:
Free USPS First Class®.
Located in: Miami, Florida, United States
Delivery:
Estimated between Sat, Jul 26 and Thu, Jul 31 to 94104
Delivery time is estimated using our proprietary method which is based on the buyer's proximity to the item location, the shipping service selected, the seller's shipping history, and other factors. Delivery times may vary, especially during peak periods.
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Seller does not accept returns.
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eBay item number:176982655100
Last updated on May 28, 2025 04:52:02 PDTView all revisionsView all revisions

Item specifics

Condition
New: A brand-new, unused, unopened, undamaged item in its original packaging (where packaging is ...
Power Source
Battery, Hardwired
Color
White
Item Diameter
No
Year Manufactured
2024
MPN
9120B
Item Depth
2 in
Smart Home Compatibility
Amazon Alexa
Brand
BRK
Type
Smoke Alarm
Number of Batteries
1
Model
9120B
Features
Battery Backup
Country/Region of Manufacture
Mexico
Smart Home Protocol
Bluetooth, Powerline/UPB
Operating Sound Rating
1
Power
Smoke
Item Weight
1 pounds
Category

Item description from the seller

About this seller

Gazelle-Intensity

98.4% positive feedback•5.4K items sold

Joined Sep 2020
Usually responds within 24 hours
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Detailed seller ratings

Average for the last 12 months
Accurate description
4.8
Reasonable shipping cost
4.8
Shipping speed
5.0
Communication
5.0

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  • a***r (37)- Feedback left by buyer.
    Past month
    Verified purchase
    Exactly as described - new in box with long expiration date. More than reasonable price! Super fast communication and shipping from seller. Very much appreciated! One of the easiest transaction I've ever had on ebay.
    BRK First Alert 9120B Smoke Detector AC Powered Battery & Back-Up MAY2024 (#176982659984)
  • s***8 (824)- Feedback left by buyer.
    Past 6 months
    Verified purchase
    Shipping is fast pack nicely with care and its true declaration value of the hat is more than what was said it says used but looks so brand new. Seller so easy to talk to very friendly will buy here again. Thank you
    Boston Celtics Basketball Hat Snapback New Era 9Fifty Cap Men's One Size Black (#176957033846)
  • a***7 (12)- Feedback left by buyer.
    Past 6 months
    Verified purchase
    Shirt was exactly what I wanted and what the seller said it would be! Great price! I received the shirt less than a week which I am thankful for. I would buy from this seller again!
    Vintage Unitog Pepsi Uniform Shirt Mens 15 Blue White Striped Collared Button-Up (#177073307120)
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Product ratings and reviews

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4.9
568 product ratings
  • 509 users rated this 5 out of 5 stars
  • 50 users rated this 4 out of 5 stars
  • 5 users rated this 3 out of 5 stars
  • 0 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

See all 430 reviews
  • by jaglover6864
    Apr 13, 2021Top favorable review

    Great Smoke Alarm, FAST shipping

    Works well, good value. I have 12 smoke detectors in my house; a completely refurbished 1908 home. We were required to install fire detectors in all our rooms and the remodeler installed First Alert smoke alarms and all interconnected. They are all 8 years old and a starting to fail, one at a time. I want to replace them with like kind units, and eBay was the easiest place to purchase them. I have replaced the one bad unit with this one purchased from eBay and it is working fine The unit was very reasonably priced and shipping was FAST!!

    Verified purchase: YesCondition: New

  • by mightyeng
    Jul 21, 2020Top critical review

    Replacement detector

    The reason I bought this smoke detector is because it replaced an existing one that stopped working after six years. It just slotted right in without any modifications. The house builder installed this model and it has worked satisfactorily until now. My immediate reaction to this product was that it was all a bit flimsy. The battery compartment seemed weak and plastically. However, as I don’t intend to replace the whole unit by another product, it appears that the other alarms will likewise be replaced in time. I believe they are designed to last about ten years before the radioactive source is depleted.

    Verified purchase: YesCondition: NewSold by: worldus

  • by dbc7718
    Jul 06, 2021

    Great product and was easy to replaced the old ones.

    I bought these new smoke alarm detectors to replace my current ones that were 13 year old. One started to fail so I went ahead and bought 4 to replace them all. I was a bit concerned about replacements because what usually happens is it when you have an old model, that old model would be replaced is a new model but with a different design even though it looks the same when you see a picture of one online.. I was extremely pleased that my old model was still being made and I replaced them all very easily. The base plates were exactly the same and I did not have to do any rewiring. I took less than a minute to replace each one. So yes - I am extremely happy!

    Verified purchase: YesCondition: NewSold by: torch_lighting_and_electrical

  • by ashleyalw2009
    Jul 14, 2021

    Installed easily

    I needed to replace thirty year old smoke detectors in a manufactured home. These installed easily in place of the old ones. Just a few tools, and a knowledge of electrical connections and safety required. I love the fact that these also have a battery backup. The old ones did not have this option. You don't give a lot of thought to smoke detectors until you need one, or they fail. These seem to be good ones.

    Verified purchase: YesCondition: Pre-OwnedSold by: worldus

  • by riwe-4196
    Aug 04, 2021

    Great Value

    This is a direct replacement for the original units in my home. There was no need to change the mounting plate or the wiring harness. Yes there are new units that have a 10 year sealed battery, but the cost is higher. The common 9 Volt battery is very easy to replace once a year as recommended.

    Verified purchase: YesCondition: NewSold by: elementalexchange

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