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
Market direction turned downward with current $91.11 representing 0.2% over standard pricing.
| Price Type | Price | Date |
|---|---|---|
|
Highest Price
|
$139.99 | |
|
Lowest Price
|
$56.95 | |
|
Most Recent Price
|
$139.99 |
| Price Type | Price | Date |
|---|---|---|
|
Highest Price
|
$96.99 | |
|
Lowest Price
|
$44.25 | |
|
Most Recent Price
|
$91.11 |
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.
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.
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!
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
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.
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.
These smoke alarms arrived quickly and were easy to install. Wiring them was a breeze. I'm all set for the next ten years.
Replaced old ones perfectly. Didn't even need to replace the wiring harness. Still early but so far so good.
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.
loved it. good price, good value. i eish shipping and return was free.
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!
Detailed price history for the past 90 days
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.
| 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 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 | — | — |