Kidde KN-COPP-3 Plug-In Carbon Monoxide Detector
- Carbon monoxide detector, plug in with 9V battery backup
- 85 dB audible alarm
- Digital display and LED status lights
- Ionization sensor type, listed for residential use
- 10 year limited warranty
- 1.75 x 3.75 x 6.06 inches, ABS enclosure
Last refreshed Sep 8, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A plug-in carbon monoxide detector with a battery backup, digital display and loud alarm for home use. It detects CO only, so it does not replace smoke alarms.
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ASIN: B00002N86AModel: KN-COPP-3Category: Smoke Detectors & Fire Alarms
Overview
Not a smoke alarm, this Kidde unit watches for carbon monoxide and plugs straight into a wall outlet. A 9V battery stands by if power drops, a digital display shows readings and LED lights show status.
Plug-in power with a battery backup means it continues through an outage, and the display and status lights make its state easy to read. The limitation is that it is a CO detector only, and the listing lists a sensor type that is unusual for this kind of device.
Who it's for
Bedroom hallways and utility areas where CO could build up suit a plug-in detector with a display. Those who also need smoke or fire detection should add a separate alarm.
Pros and cons
- Battery backup during outages
- LED status lights
- Wall mount hardware included
- Long limited warranty
- Detects carbon monoxide only
- Needs an outlet for plug-in use
- ABS plastic enclosure
- Sensor type entry looks unusual
Performance notes
The detector senses carbon monoxide in the air and sounds the horn at a set loudness when a threshold is reached. The display shows the level and the LED lights show power and status. Outlet power drives it normally, and the 9V battery takes over if the outlet loses power.
Specifications
| Brand | Kidde |
|---|---|
| Model | KN-COPP-3 |
| Dimensions & fit | |
| Item Dimensions D X W X H | 1.75 x 3.75 x 6.06 inches |
| Capacity & performance | |
| Upper Temperature Rating | 37.8 °C |
| Power & efficiency | |
| Power Source | Plug in, 9V battery backup |
| Construction & materials | |
| Enclosure Material | ABS |
| Color | White |
| Compatibility & installation | |
| Compatible Devices | Residential |
| Included components | |
| Included components | One 9V battery, one CO alarm, one mounting hardware packet, one user manual |
| Unit Count | 1 Count |
| Warranty & support | |
| Manufacturer Warranty Description | 10 year limited |
| Other details | |
| Sensor Type | Ionization |
| Alarm | Audible, 85 dB |
| Product Style | 3rd Edition |
| Item Type Name | Carbon monoxide detector |
| Mfr Part Number | 900-0076 |
| Operating Humidity | 5% to 95% relative humidity, non-condensing |
Frequently asked questions
What is included with the Kidde KN-COPP-3?
One CO alarm, one 9V battery, one mounting hardware packet for the wall-mount option and one user manual.
Does the Kidde KN-COPP-3 detect smoke?
No. It is listed as a carbon monoxide detector, so a separate smoke alarm is needed.
Does the Kidde KN-COPP-3 work in a power outage?
It has a 9V battery backup for that purpose, and the battery is included.
Is the Kidde KN-COPP-3 hardwired?
No. The power source is plug in, with the battery as backup.