Image of the front of the Kidde KN-COSM-BA

    Battery Powered Smoke & Carbon Monoxide Alarm

    KN-COSM-BA

    The Kidde KN-COSM-BA Combination Smoke & Carbon Monoxide Alarm provides two important safety devices in a single unit. This alarm includes a voice warning system that announces “Fire, Carbon Monoxide, Low Battery and Smart HushTM Activation.” The voice alarm eliminates any confusion and clearly warns you and your family of a smoke or carbon monoxide danger, or if your battery is in need of replacement. This technologically advanced combination alarm is battery operated protecting you and your family even during a power outage when many incidences occur.

    • Voice Alarm
      Announces the hazard type detected.

    • LEDs
      Two LEDs are provided. Flashing green for normal operation
      and flashing red for alarm condition.

    • Single Test/Reset and Hush™ Button
      Tests alarm circuitry and triggers the voice announcement.
      Temporarily silences nuisance alarms.

    • Front Load Battery Door
      Replace the 2 AA batteries without disconnecting from mounting bracket.

    • Peak Level Memory
      Alerts user when the unit has detected CO concentrations of 100ppm or higher

    Helpful Resources

    Upgrade to

    This model is to be replaced with 30CUDR

    View Product
    The front photo of the 30CUDR smoke and CO alarm.View Product
    Image of the front of the Kidde KN-COSM-BA
    Details
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    Key Features
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    Helpful Resources

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

    Helpful Resources
    Download iconProduct Data Sheet
    Download iconUser Guide
    Thumbnail of the video "Understanding your Fire Alarm Sounds"Play button

    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.

    Kidde's comprehensive suite of products, including smoke and carbon monoxide alarms, and fire extinguishers. Number 1 home safety fire brand badge at the top.