This item is out of stock.

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

Gazelle-Intensity
(1978)
Seller's other items
Contact seller
US $21.00
or Best Offer
Condition:
New
Out of Stock31 sold
Shipping:
Free USPS First Class®.
Located in: Miami, Florida, United States
Delivery:
Estimated between Fri, Dec 12 and Thu, Dec 18 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.
Returns:
Seller does not accept returns.
Payments:
       Diners Club
Earn up to 5x points when you use your eBay Mastercard®. Learn moreabout earning points with eBay Mastercard

Shop with confidence

eBay Money Back Guarantee
Get the item you ordered or your money back. Learn moreeBay Money Back Guarantee - opens new window or tab
Seller assumes all responsibility for this listing.
eBay item number:176982659984
Last updated on Dec 04, 2025 20:45:19 PSTView 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
Smart Home Protocol
Bluetooth, Powerline/UPB
Country of Origin
Mexico
Operating Sound Rating
1
Power
Smoke
Item Weight
1 pounds
Category

Item description from the seller

About this seller

Gazelle-Intensity

99.3% positive feedback•6.4K items sold

Joined Sep 2020
Usually responds within 24 hours
Visit storeContact

Detailed seller ratings

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

Popular categories from this store

See allcategories
TravelDolls & Bears

Seller feedback (1,994)

All ratingsselected
Positive
Neutral
Negative
    • a***r (40)- Feedback left by buyer.
      Past 6 months
      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.
    • e***e (1284)- Feedback left by buyer.
      Past month
      Verified purchase
      Smooth transaction
    • 4***l (306)- Feedback left by buyer.
      Past year
      Verified purchase
      Fast shipping and reasonable price
    See all feedback

    Product ratings and reviews

    Learn more
    4.9
    574 product ratings
    • 514 users rated this 5 out of 5 stars
    • 51 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 436 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

    More to explore :