Message to Our Customers


Model # KN COSM B

Internet # 100655554

Battery Operated Combination Smoke and CO Alarm with Voice Alert (6-Pack)

This item has been discontinued.
The Home Depot no longer carries this specific product.

$198.00 /each



Model # KN COSM B

Internet # 100655554

Kidde Combination Carbon Monoxide and Smoke Alarm provides two important safety devices in a single unit. This alarm includes a voice warning system that announces the threat detected- Fire. Fire. Fire. or "Warning, Carbon Monoxide", Low Battery or Smart Hush Activation. This technically advanced combination alarm is battery operated protecting you and your family even during a power outage when many incidences occur. Easy to install alarm that is suitable for all areas of the home and has a 5 year limited warranty.

  • Talking alarm - announces the hazard type detected (fire or CO)
  • Test/reset button - tests alarm circuitry and triggers the voice announcement
  • Combined carbon monoxide and smoke alarm - a single unit can be installed where previously, two were needed and reduces installation time and helps to keep home decor attractive
  • 2-LED's are provided, flashing green for normal operation and flashing red for alarm condition
  • Battery included

Info & Guides

You will need Adobe® Acrobat® Reader to view PDF documents. Download a free copy from the Adobe Web site.


Product Depth (in.) 
Product Height (in.) 
Product Width (in.) 
Alarm Sensor Type 
Alarm Type 
Carbon Monoxide,Smoke 
Alarm/Detector Features 
Hush Feature,Value Pack,Voice Alert 
Commercial / Residential 
Commercial / Residential 
Connector/Contact Type 
Power Source 
Voltage (volts) 
Warranty / Certifications
Certifications and Listings 
1-UL Listed 


Rated 4.2 out of 5 by 17 reviewers.
Rated 1.0 out of 5.0 by Frequent falsing I hate these detectors with a white hot passion. I bought them for a retrofit in an old house. Now six months later, I'm shopping for a new brand to replace them all. They false very frequently: Both the smoke and CO functions. Maybe that's just reality with all resdiential smoke detectors. What makes the Kidde/Firex detectors uniquely annoying is that they don't have a silence button. They have a "hush" function that is supposed to turn down the sensitivity, but in practice often does nothing. It creates a situation where there's no way to silencing a falsing system without either unplugging the alarm or beating it to death. (I've done both) I would strongly recommend NOT buying Kidde/Firex detectors as they all seem to have this "feature". August 24, 2014
Rated 1.0 out of 5.0 by Junk 2am, way to frequently, FIRE FIRE. There is not a fire, shut up. False alarms all the time. I clean them. I replaced them. I sprayed bug spray to keep bugs out since that's what the company said was the problem. Nothing works. All of these are getting replaced in my house. October 3, 2014
Rated 4.0 out of 5.0 by 6 Pack of Smoke Alarms I think this product is a good solution for people who rent out apartments on a small business basis. It saves money. I wish it was available at the store, too, but it is only available online. September 26, 2009
Rated 5.0 out of 5.0 by Battery Operated Combination Smoke and CO Alarm with Voice Alert (6-Pack Very easy assamble , easy installation and very compact. March 24, 2015
Rated 5.0 out of 5.0 by the best SAVED OUR FAMILY THIS SAVED OUR LIFES!! I have 2 of these in my house one in my bedroom and one in my child's room. I have impaired hearing and I do sleep with the tv on high. My child woke me up age 4 telling me the wall is talking saying "carbon beep beep** Carbon beep beep"" We had a chance to get out fast enough for the fire fighter. It is loud so I can hear it.Also When batterys are low it talks to you "" LOW BATTERYS BEEP BEEP" !! September 11, 2012
Rated 4.0 out of 5.0 by Necessary purchase for the whole house It has all the features I was looking with this alarm combination. February 4, 2015
Rated 5.0 out of 5.0 by What A Deal Fast shipping, easy to install, good dollar value!! January 6, 2015
Rated 4.0 out of 5.0 by Good Vaue, Plain packaging Good value, plain packaging, good shipping and a good product. December 10, 2014
  • 2015-07-01T13:50:51.375-05:00
  • bvseo_lps, prod_bvrr, vn_prr_5.6
  • cp-1, bvpage1
  • co_hasreviews, tv_17, tr_17
  • loc_en_US, sid_100655554, prod, sort_default
2 >>


Standard Shipping includes delivery by small parcel service. Processing time varies by product.

If product is eligible for shipping to AK, HI and US Territories additional transit time and remote surcharges may apply.