First Alert SC9120B Direct Wire Combination Smoke and Carbon Monoxide Detector, 120 Volt 9 Volt Battery Back-up - 3 Pack price history and forecast - First Alert SC9120B
First Alert SC9120B Direct Wire Combination Smoke and Carbon Monoxide Detector, 120 Volt 9 Volt Battery Back-up - 3 Pack

First Alert SC9120B Direct Wire Combination Smoke and Carbon Monoxide Detector, 120 Volt 9 Volt Battery Back-up - 3 Pack

Brand:
First Alert
Model Number:
SC9120B
UPC:
634705653331
EAN:
0634705653331
Walmart SKU:
935861140

Third-Party Seller Summary

Third-Party Seller Price History Summary
Price Type Price Date
Highest Price
$239.99
Lowest Price
$109.95
Most Recent Price
$190.99
Average Price
$180.55
First Tracked
Last Update

Walmart.com Summary

No price history available for Walmart.com

Price Analysis

Price history data is not available for this product at the moment.

Current Trend: No Walmart.com pricing data available for analysis.

Customer Insights: Rated 4.8/5 from 35 reviews.

Customer Reviews

35 reviews

Customer Reviews

4.8
Based on 35 reviews
5
31
4
2
3
1
2
1
1
0
Filter Reviews:
Sort By:
Showing 10 of 35 reviews

Fire/carbon monoxide alarms

Shannon May 25, 2026

My alarms needed to be replaced and I could not find them locally. On line I ordered and they work perfectly.

Was this review helpful?

Time to replace as they have a limited lifespan

LilRed January 3, 2022

My home has 11 of these combo smoke/carbon monoxide detectors hard wired throughout our home. They were installed when the home was built (2014) and reaching end of life. These a exact replacements and overall the quality is good. These newer units have 10 yr life so hope to get longer life but we'll see.

Was this review helpful?

easy battery changes!

Jen November 19, 2024

No problems yet. Easy to install, love the easy battery changes!

Was this review helpful?

First Alert alarms

Rebecca November 15, 2024

Great set. Helpful to replace existing alarms.

Was this review helpful?

Nice

Pam September 14, 2024

They work great!

Was this review helpful?
Virginia July 24, 2024

Exactly as advertised.

Was this review helpful?
Leah January 18, 2025

It seems to work ok

Was this review helpful?

Happy, great price

KBender February 15, 2022

Not much to say, but I was pleasantly surprised these came with batteries included. Quick replacement of my old ones that were 7.5 years old and started chirping they were done.

Was this review helpful?

Very easy installation

John February 16, 2024

Replaced three First Alert smoke detector model no. 9120B. These SC9120B use the exact same wiring harness. Lowe's sells the single detector for $49.98 each. Lowe's did not offer a 3-pack.

Was this review helpful?

Quality product at a reasonable price.

Joseph November 26, 2022

Liked the three pack, had two units go out in same week, and the three pack price worked well, saving a few dollars. Every dollar saved helps with what the joe-bama/commie MALADY administration is doing to our country and we the people.

Was this review helpful?

Price History

Historical price data graph for First Alert SC9120B Direct Wire Combination Smoke and Carbon Monoxide Detector, 120 Volt 9 Volt Battery Back-up - 3 Pack

Recent Price Changes

Detailed price history for the past 90 days

Walmart.com Pricing

0 records

No Walmart.com pricing data available for analysis.

No Walmart price history available in the past 90 days

Third-Party Seller Pricing

12 records

Third-Party Sellers prices have ranged from $190.99 (Jun 7) to $239.99 (May 15) over the past 90 days. Current price is 17.6% below the 90-day average of $231.82.

Third-party seller price history for First Alert SC9120B Direct Wire Combination Smoke and Carbon Monoxide Detector, 120 Volt 9 Volt Battery Back-up - 3 Pack showing recent price changes
Date Price Change % Change
$190.99 $+0.00 +0.0%
$190.99 $-49.00 -20.4%
$239.99 $+0.00 +0.0%
$239.99 $+0.00 +0.0%
$239.99 $+0.00 +0.0%
$239.99 $+0.00 +0.0%
$239.99 $+0.00 +0.0%
$239.99 $+0.00 +0.0%
$239.99 $+0.00 +0.0%
$239.99 $+0.00 +0.0%
$239.99 $+0.00 +0.0%
$239.99

Related Products