BoolPool Logo.
Reviews Categories
*By registering an account, you are certifying that you have read and agree to the BoolPool Terms of Service.

Review of Kidde KN-COSM-B Battery-Operated Combination Carbon Monoxide and Smoke Alarm with Talking Alarm
4.30 stars Very Good Form 506 Reviews
Reviewed on: July 06, 2013 Author:
Price Range


Pros & Cons


  • Safe and easy to setup and install
  • Employs both smoke and CO sensors
  • Battery operated alarm, no wiring needed
  • Loud and clear voice / talking alarm
  • Operates even during power outages
  • High quality and temper resistant
  • Value for money and UL listed


  • Non-emergency alarms from smoky cooking
  • Frequent battery replacements
Review Summary

This is the summary of consumer reviews for Kidde KN-COSM-B Battery-Operated Combination Carbon Monoxide and Smoke Alarm with Talking Alarm. The BoolPool rating for this product is Very Good, with 4.30 stars, and the price range is $25.00-$40.00.

The Kidde KN-COSM-B carbon monoxide and smoke alarm combines two important safety devices in a single unit. It can easily be mounted on the ceiling or on the walls thus reducing the installation time and helps to keep home décor attractive. The alarm includes a loud and clear voice warning system that announces “Fire, Carbon Monoxide, Low Battery” and “Smart Hush Activation”. The voice alarm eliminates confusion and clearly warns you and your family of a smoke or carbon monoxide danger, or if your battery or device is in need of replacement. This technically advanced combination alarm is battery operated, protecting you and your family even during power outage. 

This device is suitable for all living areas and has a 7-year shelf life and a 5-year limited warranty. This smoke alarm uses ionization sensing technology. Ionization sensing alarms may detect invisible fire particles (associated with flaming fires) sooner than photoelectric alarms. The device is provided with two LEDs - flashing green for normal operation and flashing red for alarm conditions. This device ensures that the unit cannot be accidentally mounted without batteries being installed.

The sensor is very sensitive and detects even the hint of smoke from cooking pans thus requiring frequent attention to push the hush button to silence non-emergency alarms. It is a high battery consumption device that needs frequent battery replacements, but is still considered economical by many keeping their family safety in mind. Some reviewers also noticed that the device either stopped working after the first battery change or was chirping continuously every 30 seconds due to malfunction.

Overall, the Kidde KN-COSM-B Combination Carbon Monoxide and Smoke Alarm is a perfect combination of safety and temper-resistant features, beautiful neutral white finish and value for money and thus is a highly recommended smoke alarm unit. This combination smoke/CO alarm is UL listed, so you can be confident of its quality, and it is backed by a five-year limited warranty.

User Voice
Kidde KN-COSM-B Battery-Operated Combination Carbon Monoxide and Smoke Alarm with Talking Alarm
Sensitive and loud alarm Voice activated alert feature Detects even a hint of smoke from cooking pans Lady voice gives smoke alert instead of annoying beep sound Simple and economical solution Ionization detects flame particles
Review Group #: 1 Rating :
4.00 stars
14 Reviews See Details
Talking fire and carbon monoxide detector Batteries run out pretty quickly and need constant replacements Uses inexpensive AA batteries Includes 3 AA batteries Beeps whenever the unit needs a replacement
Review Group #: 2 Rating :
4.00 stars
16 Reviews See Details
Great deal for fire and CO features Decent ionization detector Unit has a shelf life of 7 years Likely to cause false alarms Digital indicator to detect current CO levels instead of just danger levels would be an added advantage
Review Group #: 3 Rating :
3.50 stars
20 Reviews See Details
Battery replacement needed from time to time Advised to change unit every 5-7 years
Review Group #: 4 Rating :
4.50 stars
21 Reviews See Details
Easy to figure out and install Loud and nice alarm tone Easy to mount on the wall or ceiling Battery change is an easy process Installation hardware included
Review Group #: 5 Rating :
4.50 stars
24 Reviews See Details
BoolPool Customer Reviews Write Review
Have a comment or question? Post Comment/Question
Ratings Badge
Rating : 4.30Very Good
Read Product Review