Smoke and Carbon Monoxide Detector - Dual Technology - Battery Operated

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Brand: Kidde
Mfr Part Number: 21006974

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The Kidde KN-COSM-BA 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 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 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 installation time and helps to keep home decor attractive
  • Test/Reset Button – Tests alarm circuitry and triggers the voice announcement
  • LEDs – Flashing green for normal operation and flashing red for alarm condition
  • 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
  • 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
  • Hush Feature – Temporarily silences nuisance alarms

Brochures & Spec Sheets

Spec SheetKidde 21006974 SpecsDocumentationKidde KN-COSM-B Installation

Electrical & Operational Information

Operating Temperature40°F - 100°FWiring TypeBattery


Alarm TypeSmoke/Fire, Carbon MonoxideColor FinishWhite
Housing MaterialThermoplasticHumidity Range5% - 95%
Sensor TechnologyElectrochemical, IonizationSound Level (db)85

Warranty & Certifications

CertificationsNFPA, CSFMProduct Warranty5 Years
UL Listedyes

Dimensions & Measurements

Product Length (in.)1.7Product Width (in.)5.75
Product Height (in.)5.75

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