CN
“The Onelink Safe & Sound is a smoke detector, CO detector, and Alexa speaker in one — the 85 dB alarm is the loudest we've tested”
Is the First Alert Onelink Safe and Sound worth it?
The First Alert Onelink Safe and Sound ($249-$279) is recommended with a 8.2/10 consensus score across 9 expert reviews. Experts highlight 85 db alarm audible from 3 rooms away and built-in alexa speaker — doubles as smart speaker. CNET says: "The Onelink Safe & Sound is a smoke detector, CO detector, and Alexa speaker in ..." Best for: Large homes, Multi-story layouts, Alexa households.
Recommended9 Expert Reviews
Price Range
Check Price on Amazon →$249-$279
Affiliate link — we earn a commission at no extra cost to you
First Alert Onelink Safe and Sound
NM
Nicholas Miles · Editor-in-Chief & Methodology Owner
Sensors
SHE ScoreAbove Average
SmartHomeExplorer proprietary rating
6.1/10
9 expert sources
Compatibility Breadth5/10
Setup Ease5.6/10
Reliability6.8/10
Value Rating7.9/10
Future-Proofing5/10
The First Alert Onelink Safe and Sound earns a SHE Score of 6.1/10, driven by strong value (7.9/10) with room to improve in future-proofing (5/10). Based on 9 expert sources and SmartHomeExplorer compatibility analysis.
How we calculate the SHE Score →Expert Consensus: 8.2/10 across 9 sources
Updated 2 weeks ago“The Onelink Safe & Sound is a smoke detector, CO detector, and Alexa speaker in one — the 85 dB alarm is the loudest we've tested”
Key Features
- ✓ 85 dB alarm
- ✓ Built-in Alexa
- ✓ Mesh networking
- ✓ Emergency lighting
Best For
Large homesMulti-story layoutsAlexa households
First Alert Onelink Safe and Sound vs. the alternatives
How the First Alert Onelink Safe and Sound stacks up against other Security options on price, expert consensus, and our proprietary SHE Score.
| Product | Price | Consensus | SHE Score | Works With | Verdict |
|---|---|---|---|---|---|
| First Alert Onelink Safe and SoundThis page | $249-$279 | 8.2/10 | 6.1/10 | Amazon Alexa | Recommended |
| Aqara Door and Window Sensor | $37.99 | 8.1/10 | 6.8/10 | Apple HomeKit, Matter | Recommended |
| Aqara Motion Sensor P1 | $18.99 | 8/10 | 6.4/10 | Apple HomeKit | Recommended |
| Nest Protect | $119-$129 | 9/10 | 6.7/10 | Google Home, Amazon Alexa | Must Buy |
The First Alert Onelink Safe and Sound ($249-$279) earns a 8.2/10 expert consensus and a 6.1/10 SHE Score across 9 sources, versus the Eufy Security S330 Video Doorbell at $98.99 (8.7/10 consensus). It works with Amazon Alexa.
What Experts Agree On
What Experts Love
- ✓ 85 dB alarm audible from 3 rooms away
- ✓ Built-in Alexa speaker — doubles as smart speaker
- ✓ Mesh networking works during WiFi failures
- ✓ Philips Hue emergency lighting integration
- ✓ AC-wired with battery backup
Common Criticisms
- ✗ Most expensive smart detector at $249
- ✗ Larger than standard detectors
- ✗ AC wiring required — not renter-friendly
Tap any pick to check its live price on Amazon.
eufy X10 Pro Omni
$479.98RecommendedView on Amazon
Level Bolt Smart Lock
$159-$199RecommendedView on Amazon
eufy Security eufyCam S3 Pro 2-Cam Kit
$549.99Must BuyView on Amazon
Apple AirTag (2nd Generation) 4-Pack
$94.99Must BuyView on Amazon
iRobot Roomba Combo j5
$199.99RecommendedView on Amazon
Ring Battery Doorbell Plus
$179.99RecommendedView on Amazon
What The Experts Say
Ready to buy the First Alert Onelink Safe and Sound?
Check Price on Amazon$249-$279 · 9 expert sources · 8.2/10 consensus
Featured in these buying guides
See how the First Alert Onelink Safe and Sound ranks against the full field in our Security buying guides.
Shop similar on Amazon
Comparable Security picks you can buy today — each link goes straight to its current Amazon listing.
Frequently Asked Questions
Is the First Alert Onelink Safe and Sound worth it?
The First Alert Onelink Safe and Sound earns a 8.2/10 consensus score across 9 expert sources and is rated "Recommended". At $249-$279, it is best for Large homes. CNET notes: "The Onelink Safe & Sound is a smoke detector, CO detector, and Alexa speaker in one — the 85 dB alarm is the loudest we've tested"
How much does the First Alert Onelink Safe and Sound cost?
The First Alert Onelink Safe and Sound is priced at $249-$279. With a 8.2/10 score from 9 expert reviews and a "Recommended" rating, that price represents fair value relative to the ~7.5/10 average for Security products. Prices shift often, so check the live figure before buying.
Who is the First Alert Onelink Safe and Sound best for?
The First Alert Onelink Safe and Sound is best for Large homes, Multi-story layouts, Alexa households. Experts rate it "Recommended" with a 8.2/10 consensus across 9 sources.
How does the First Alert Onelink Safe and Sound compare to other Security options?
Among the Security products we have aggregated, the First Alert Onelink Safe and Sound ranks above average with a 8.2/10 score. See our full category comparison for head-to-head details.
What smart home systems does the First Alert Onelink Safe and Sound work with?
The First Alert Onelink Safe and Sound works with Amazon Alexa. Check the compatibility notes above for any hub dependencies or setup requirements before you buy.
What are the best alternatives to the First Alert Onelink Safe and Sound?
If the First Alert Onelink Safe and Sound ($249-$279, 8.2/10) is not the right fit, the closest alternatives in Security are Nest Protect, Kidde RemoteLync Monitor, Ring Alarm Smoke & CO Listener. Compare them on price, ecosystem support, and expert consensus to find your match.
What are the pros and cons of the First Alert Onelink Safe and Sound?
The main strengths of the First Alert Onelink Safe and Sound are 85 db alarm audible from 3 rooms away and built-in alexa speaker — doubles as smart speaker. The most-cited downside is most expensive smart detector at $249. Overall, 9 expert sources rate it "Recommended" with a 8.2/10 consensus score.
Sources & Methodology
This review aggregates 1 independent expert review into a single consensus score. See how we build consensus scores and the SHE Score methodology.
Expert review sources cited on this page:
Affiliate disclosure: SmartHomeExplorer.com participates in the Amazon Associates program. We earn a commission from qualifying purchases at no extra cost to you. This consensus review is based on 9 independent expert reviews — we did not test this product ourselves. Always verify current prices and availability before purchasing.
Independence notice: Smart Home Explorer is an independent publication. First Alert and other product names, logos, and brands referenced on this page are the property of their respective owners and are used for identification purposes only. This review is not sponsored by, affiliated with, or endorsed by First Alert or any other manufacturer named in this article.