Kidde Nighthawk Carbon Monoxide Alarm with Digital Display, Model KN-COPP-B-LP

4.6 stars out of 51 reviews
(4.6)|
51 ratings

Key item features

  • Digital Monitoring: Features a digital display showing carbon monoxide (CO) levels in parts per million (PPM), with updates every 15 seconds to track changes.
  • Peak Memory: Includes a peak level memory function that displays the highest CO concentration detected since the last reset.
  • Battery Operation: Operates on three included AA batteries, ensuring continuous protection against CO dangers even during power outages.
  • Safety Features: Equipped with a battery lockout system to prevent operation without installed batteries and a test/reset button for proper function verification.
  • Extended Lifespan: Provides a 10-year end-of-life warning, offering 40% longer protection than other CO alarms.
  • Flexible Installation: Designed with multiple mounting options, allowing for convenient placement on a wall or tabletop.
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Current price is $35.98
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Customer ratings & reviews

4.6 out of 5 stars
stars51 ratings30 reviews
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Reviews summary

Pros
  • : Offers good value for its size and features.
Neutral
  • : Can be reliable and timely, but may also malfunction.
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Showing 1-3 of 30 reviews

Jan 6, 2026
Aurora
5 out of 5 stars review

Verified Purchase

Small price to pay for peace of mind

I have 4 of these in my home. They are easy to use and set up. I have one outside each bedroom and in the furnace room.

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Helpful?2NT6O42LH9KD16930272
reply from Kidde Expert

Thank you for choosing Kidde, Aurora!

Jun 3, 2025
Jazzman
5 out of 5 stars review

Verified Purchase

Best in Class!

Best in Class, game changer at the right price

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Nov 19, 2025
Laurie
5 out of 5 stars review

Verified Purchase

Working well.

Easy to install, battery lasts. Simple, solid product so far.

Incentivized Review
Helpful?2NT6O42LH9KD16930272
reply from Kidde Expert

We appreciate you taking the time to leave a review, Laurie! Happy to hear you’re finding it simple and reliable.