Is the Kidde Carbon Monoxide Detector worth it?
A top pick in Tools & DIY on Amazon (#6 when we checked, Oct 27, 2026)
Worth it if you want a plug-in carbon monoxide detector with two-AA battery backup, an 85 dB audible alarm, and a Test-Hush button for straightforward testing and silencing.
Good to know: If you need smoke detection in the same unit or placement away from a suitable 120V outlet, look for a model designed for that setup.
A plug-in carbon monoxide detector with backup power
The Kidde Carbon Monoxide Detector keeps installation direct. Plug it into a standard 120V outlet, then use the two-AA battery backup for protection during a power outage. You avoid hardwiring, while still having a second power source built into the detector.
That backup is the design choice that improves daily ownership. The detector normally runs from the outlet, and the batteries provide backup when household power is unavailable. For a chosen location with a suitable outlet, that means less installation work and a clear plan for an outage. Check the surrounding space too: the listed unit measures 2.32 inches deep by 2.83 inches wide by 4.72 inches high.
If carbon monoxide is detected, the 85-decibel audible alarm announces it. LED status indicators show the detector's status. The Test-Hush button gives you a reachable control for testing the unit or silencing false alarms, while Peak Level Memory records the last time carbon monoxide was detected or when the unit was tested.
The practical result is simple: plug in one detector, install the included AA batteries, and keep testing and hush controls close at hand. That is a useful fit for buyers who want backup power without a more involved installation.
You get one plug-in detector with two AA alkaline batteries, an 85 dB alarm, LED status indicators, Peak Level Memory, and a Test-Hush button. The value is simple installation plus backup power in one unit.
Great for
- Homes with a suitable standard 120V outlet
- Buyers who want AA battery backup during outages
- People who prefer an 85 dB audible alarm
- Anyone who wants Test-Hush control and Peak Level Memory
Maybe not for you if
- You need smoke and carbon monoxide detection in one unit
- You need placement away from a suitable outlet
- You prefer a different power arrangement
The Kidde Carbon Monoxide Detector suits buyers who want a direct plug-in setup, battery backup for power outages, and an audible 85 dB alert. The Test-Hush button keeps routine checks and false-alarm silencing straightforward, while Peak Level Memory records recent detection or testing information. Confirm that your chosen location has a standard 120V outlet and room for the listed dimensions. If it does, this is a practical way to add carbon monoxide detection with minimal installation work.
Amazon shoppers rate it 4.8 out of 5 across 1,324 ratings. That is their number, not ours.
Quick answers before you buy
Does it plug into a standard outlet?
Yes. It plugs into a standard 120V AC outlet. Check the location and the listed 2.32 x 2.83 x 4.72-inch dimensions before installation.
Does it have backup power?
Yes. Two AA alkaline batteries provide backup during a power outage.
How loud is the alarm?
The audible alarm is rated at 85 decibels and announces when carbon monoxide is detected.
Can I test or hush it?
Yes. The Test-Hush button lets you test the detector or silence false alarms. The listing says Smart-Hush silences the unit for approximately 8 minutes.
What is included?
The package includes one Kidde carbon monoxide detector and two AA alkaline batteries for backup power.
The spec sheet, for those who want it
| Brand | Kidde |
|---|---|
| Model Number | KN-COB-DP2 |
| Number of Items | 1 |
| Built-In Media | AA Battery Backup |
| Item Type Name | Carbon Monoxide Detector |
| Mfr Part Number | KN-COB-DP2 |
| Power Source | Plug In |
| Alarm | Audible |
| Operating Humidity | 10 to 95% relative humidity (RH), non-condensing |
| Product Style | 3rd Edition |
| Color | White |
| Item Dimensions D x W x H | 2.32"D x 2.83"W x 4.72"H |
| Brand | Kidde |
| Style | 3rd Edition |
| Power Source | Plug In |
| Color | White |
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