Carbon monoxide alarm (Kidde) displays a red digital readout, with test/reset and peak-level buttons below on a white, wall-mounted plastic unit against a plain background.

AC Plug-in Operated Carbon Monoxide Alarm with Digital Display

KN-COPP-3

Provides peace of mind against the silent killer and a digital display

  • Digital Display - Displays the level of carbon monoxide the unit is sensing. The unit updates this reading every 15 seconds.

  • Test/Reset Button - Tests unit’s electronic circuitry and horn and resets the unit during alarm.

  • Peak Level Button - Displays the peak CO level recorded by the alarm since it was last reset or unplugged.

Helpful Resources

Upgrade to

This model is to be replaced with KN-COP-DP-10YL

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Carbon monoxide alarm displays red "8.8.8" digits on its LED while the test/reset dial rests below, set against a plain white background in a close-up front view.View Product
Carbon monoxide alarm (Kidde) displays a red digital readout, with test/reset and peak-level buttons below on a white, wall-mounted plastic unit against a plain background.
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Helpful Resources

Click on the video to learn more about how to install your Kidde Carbon Monoxide alarm.

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Thumbnail of the video "How to Protect Your Home Against Carbon Monoxide"Play button
A red fire extinguisher and three Kidde smoke/CO detectors (one boxed) stand arranged on a light wood tabletop against a pale wall, accompanied by a round "#1" safety-brand badge.

Why Kidde

As North America's #1 home fire safety brand,* Kidde has been working to help make your home the safest it can be for more than 100 years. Now, our latest smoke alarms and combination smoke + carbon monoxide (CO) alarms are bringing you the next level of fire and CO safety. Help protect what matters most in your life with features like cutting edge technology that send fast alerts to give your family more time to get out safely. And enhanced sensing technology that reduces false alarms often caused by cooking.

*Based on total household installations as of December 2023.