Kidde Smart Carbon Monoxide Detector & Indoor Air Quality Monitor, Plug-In, WiFi, Alexa Compatible Device, Voice & App Alerts
Best for
Best with air quality monitoring
Amazon rating
Amazon aggregate, one input among many in the Verdict Score
Based on 2 trusted sources
Current price
$69.99
Updated May 18, 2026 · 1 min read
Sources behind this verdict
10 reviewers weighted by source trust
The consensus
What reviewers found
Synthesized across the trust-weighted source mix below.
Across the reviewers we read, this is the Kidde smart CO pick if you also want basic indoor air-quality monitoring rolled into the same device. Techhive.com's verdict frames it as a 'very good smoke and carbon monoxide detector' with IAQ added for 'just a little more' money, and homedepot.com verified-purchase reviewers praise the in-app air-quality breakdown alongside the CO readout. The plug-in form factor with battery backup is the most-cited convenience win across walmart.com and homedepot.com retailer reviews.
What reviewers liked
- Techhive.com positive verdict on combined CO + indoor air quality functionality
- Plug-in design with AA backup is repeatedly called out as easy to install
- UL 217 and UL 2034 certified per amazon.com product listing
- Strong Amazon review volume (325) at a 4.2 average corroborates retailer signals
- Works with Alexa for voice status checks per the product page
Where it falls short
- r/firealarms threads cite ongoing Kidde quality-control complaints
- Air-quality monitoring is basic, not lab-grade, per techhive.com framing
- Some r/smarthome commenters prefer hardwired interconnect for life-safety
- Smart features tied to Kidde's own app ecosystem
- Homedepot.com reviewers occasionally report Wi-Fi setup friction
Across the reviewers we read, this is the Kidde smart CO pick if you also want basic indoor air-quality monitoring rolled into the same device. Techhive.com's verdict frames it as a 'very good smoke and carbon monoxide detector' with IAQ added for 'just a little more' money, and homedepot.com verified-purchase reviewers praise the in-app air-quality breakdown alongside the CO readout. The plug-in form factor with battery backup is the most-cited convenience win across walmart.com and homedepot.com retailer reviews.
The high-trust signal is mixed. r/homeautomation users with multiple Kidde detectors describe them positively, citing the 10-year lithium backup and interconnect behavior, but r/firealarms threads push back hard on Kidde quality control over the past few years, and one r/smarthome commenter flatly avoids 'smart' life-safety devices in favor of hardwired interconnect. Amazon's 4.2 star average across 325 reviews lands consistent with that mixed picture rather than contradicting it.
Reviewers generally agree the air-quality data is informational rather than precision instrumentation, so treat the IAQ feature as a useful supplement, not a replacement for a dedicated air-quality monitor.
- Industry First
- 2-in-1 Detection - Carbon monoxide detector & Indoor Air Quality Monitor combo alerts you to both CO & indoor air quality hazards, in a single device
- Voice Alarm announces the hazard type when detected
- “Warning Carbon Monoxide” = CO gas, or "Replace Alarm" when the unit has come to its end of life span
- Easy Installation
- download the Kidde app, scan the QR code on the back of the CO alarm, & plug into a standard outlet
- Compatible with Amazon Alexa, Google Home, iPhone, & Android smart devices
- Indoor Air Quality Monitoring
- monitors harmful chemicals known as Total Volatile Organic Compounds (TVOCs) that come from cleaning products & paint, also monitors humidity
I love my kidde detectors, 120v powered, interconnect wire so we don't miss an alarm in the basement untility room, 10 year lithium battery ...
What's striking is the device's clean design—it's white and blends well in most modern home interiors. I loved how it came with all necessary ...
Trust tier reflects our editorial assessment of the source, not the individual quote. Hover for the rationale. See how we tier sources →
“Kidde Smart CO Detector & Air Quality Monitor Explained” · YouTube
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