Kidde Smoke and Carbon Monoxide Detector Alarm with Voice Warning | Battery Operated | Model # KN-COSM-BA | 6 Pack

Price: $139.00
(as of Oct 15, 2026 04:36:02 UTC – Details)


The Kidde KN-COSM-BA Battery-Operated Carbon Monoxide and Smoke Alarm combines two important safety devices into a single unit. This alarm includes a voice warning system that announces “Fire, Carbon Monoxide, Low Battery, or 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 unit uses two AA batteries, protecting you and your family even during a power outage.
Voice Alarm – Announces the hazard type detected thereby helping to speed up the correct reaction to the hazard detected. Alarm announces “Fire” when a smoke or fire hazard is detected and announces “Warning Carbon Monoxide” when a CO hazard is detected.
Combined Carbon Monoxide and Smoke Alarm – A single unit can be installed where previously, two were needed. Reduces installa-tion time and helps to keep home décor attractive
Test/Reset Button – Tests alarm circuitry and triggers the voice announcement.
Low Battery Warning – The unit warns of a low battery condition by announcing “low battery” and by initiating an alarm chirp and activating a flashing red LED.
Temperature Range:40˚F (4.4˚C) to 100˚F (37.8˚C)
Battery Powered – Provides protection even during power outages when many fire and carbon monoxide incidents occur
Battery Safeguard – The battery door will not close unless the batteries are properly installed.
Ionization Smoke Alarm Sensor
Easy to install alarm that is suitable for all liv-ing areas and has a 10-year life and a 7-year limited warranty.
The unit shall at a minimum meet the requirements of UL 2034, UL217, NFPA72, (chapter 11 2002 edition) The State of California Fire Marshall, NFPA101 (One and two family dwellings) Federal Housing Authority (FHA), Housing and Urban Development (HUD). It shall also include a 7-year manufacturer’s limited warranty
Customers find the smoke and carbon monoxide detector reliable, easy to install, and appreciate that it runs on batteries. They like the talking feature and consider it essential for security, with one customer noting it covers both CO and fire detection. The alarm’s sound level receives mixed feedback, with several customers finding it too high.