Your Cart is Empty


Kidde KN-COSM-BACA Smoke and Carbon Monoxide Alarm


The Kidde KN-COSM-BACA Combination Carbon Monoxide & Smoke 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 Hush 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.


Additional Product Details:

  • Intelligent Sensor Technology - Combines the capabilities of an ionization smoke sensor with an electrochemical carbon monoxide sensor
  • 2 AA Front-Loading Battery Door - Change the batteries without removing the unit from the ceiling. Door won't close unless they are properly installed
  • Tamper Resistant - Unit will lock to mounting bracket to deter theft or tampering
  • Low Battery Warning - Warns of a low battery condition by announcing “low battery” and by initiating an alarm chirp and activating a flashing red LED
  • Peak Level Memory - If CO level of 100ppm or more are detected since last reset, it will announce “CAUTION, CARBON MONOXIDE PREVIOUSLY DETECTED”
  • Battery Powered -Provides protection even during power outages when many fires and carbon monoxide incidents occur
  • End of Life Notification - Ten years after unit is first powered, this alarm will beep two times every 30 seconds to indicate it is time to replace the alarm
  • Meets the requirements of CAN/CSA 6.19-01 and CAN/ULC-S531
  • Power Source: Two (2) AA batteries
  • Audio Alarm: 85dB at 10ft


  • Mount Kit
  • OEM Packaging

Grade: N - New Sealed

Grade N: Working product in mint cosmetic condition, it includes all original accessories such as power supplies or power cords. This item is brand new in manufacturer’s packaging.

Battery functionality cannot be fully guaranteed.

We strictly offer a 30 day return on all our units. We cannot guarantee any further or existing manufacturer warranty. We do not offer extended warranties on any of our items for purchase.