BRK 9120B6CP Hard-Wired Smoke Alarm with Battery Backup, 6 Pack
- Brand:
- First Alert
- Model Number:
- 9120B6CP
- UPC:
- 029054121134
- EAN:
- 0029054121134
- ASIN:
- B000KKHWLU
- Walmart SKU:
- 21797418
Key Takeaway
Market direction turned downward with current $91.11 representing 0.2% over standard pricing.
Third-Party Seller Summary
| Price Type | Price | Date |
|---|---|---|
|
Highest Price
|
$139.99 | |
|
Lowest Price
|
$56.95 | |
|
Most Recent Price
|
$139.99 |
- Average Price
- $89.62
- First Tracked
- Last Update
Walmart.com Summary
| Price Type | Price | Date |
|---|---|---|
|
Highest Price
|
$96.99 | |
|
Lowest Price
|
$44.25 | |
|
Most Recent Price
|
$91.11 |
- Average Price
- $75.57
- First Tracked
- Last Update
Price Analysis
Tracking History: We have tracked BRK 9120B6CP Hard-Wired Smoke Alarm with Battery Backup, 6 Pack since 11/16/2022. The most recent price update was on Jun 13, 2026.
Price Range: Over the past 90 days, the price has ranged from $44.25 (lowest on 11/26/2022) to $96.99 (highest on 4/23/2025). The average price during this period is $75.57.
Current Trend: Walmart.com prices have ranged from $90.11 (May 12) to $91.26 (Jun 6) over the past 90 days. Current price is close to the 90-day average of $90.92.
Customer Insights: Rated 4.8/5 from 105 reviews.
Customer Reviews
105 reviewsCustomer Reviews
4.8
Based on 105 reviews
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Showing 10 of 105 reviews
Easy Replacement!
My home is approx 18 years old. My smoke detectors started chirping a few weeks ago and new batteries didn't solve the problem. Apparently these things are only good for around 10 years. They were kaput. I bought these to replace my old ones. They were very easy to install.
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Nice upgrade!
I bought these to replace the smoke alarms to replace the ones that were original since I bought my house 15 years ago. My old ones were giving me issues like going off without stopping for no reason. I love the design and the appearance of the smoke alarms. Very modern and blends right in to everything. I needed the hard wired with battery back up to replace my old ones and I came across these and their perfect. Super fast delivery!
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Worked good for me
Why has my fire alarm gone off for no good reason? Because my smoke detectors are 17 years old! I had no idea they needed to be replaced every 10 years. Pretty easy DIY remove and replace, but you have to balance up on a ladder, use a couple of screwdrivers and the box these fit into has live 120 volt unless you shut it off, READ THE DIRECTIONS
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Bought as replacement alarms
I bought these to replace our 19 year old alarms…yes, I know…shame on us for waiting so long. These were perfect and hooked right up to our hard-wired pre-existing plugs in the ceiling. Simple, straightforward. They did include new wires but we didn't use those.
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Exceptional price and delivery service
It's just too good! Excellent price (much lower than Amazon, Ebay and others) and exceptional free 1-day delivery service. If walmart.com can regularly perform like this, it will beat Amazon Prime for sure.
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Stylish and quick to install
These smoke alarms arrived quickly and were easy to install. Wiring them was a breeze. I'm all set for the next ten years.
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Perfect replacement
Replaced old ones perfectly. Didn't even need to replace the wiring harness. Still early but so far so good.
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First Alert home smoke detectors.
Very good price and easy to install and replace old ones. Reliable brand. Ten year life span and back up batteries included. Would highly recommend.
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love it. good value.
loved it. good price, good value. i eish shipping and return was free.
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Good product, good value!
Very good price for a whole bunch of them, work very well interconnected, we installed 3 of them in a series, so far so good!
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Price History
Recent Price Changes
Detailed price history for the past 90 days
Walmart.com Pricing
4 recordsWalmart.com prices have ranged from $90.11 (May 12) to $91.26 (Jun 6) over the past 90 days. Current price is close to the 90-day average of $90.92.
| Date | Price | Change | % Change |
|---|---|---|---|
| $91.11 | $-0.15 | -0.2% | |
| $91.26 | $+0.08 | +0.1% | |
| $91.18 | $+1.07 | +1.2% | |
| $90.11 | — | — |
Third-Party Seller Pricing
2 recordsThird-Party Sellers prices have ranged from $139.99 (May 4) to $139.99 (May 4) over the past 90 days. Current price is close to the 90-day average of $139.99.
| Date | Price | Change | % Change |
|---|---|---|---|
| $139.99 | $+0.00 | +0.0% | |
| $139.99 | — | — |
