First Alert SC02B Smoke & Carbon Monoxide Alarm, White

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Electrochemical CO Sensor is the most accurate technology available Latching Alarm Indicator Remembers Which Unit Initiated an Alarm.
SKU: 42903911
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State of the art smoke and CO combination alarm designed to provide early warning of a fire or carbon monoxide danger. Has a dual chamber ionization smoke sensor and an electrochemical CO sensor. Loud 85-decibel alarm, low battery warning. End of life alarm chirps when it is time to replace detector. Operates between 40F (4C) and 100 degreesF (38 degreesC) and relative humidity between 10 and 95 percent. Two latching features: alarm latch to easily identify initiating alarm after alarm condition has subsided and low battery latch: to visually identify which unit is in low battery condition. Intelligent Sensing Technology helps reduce the number of nuisance alarms. Includes dust cover, mounting anchors and screws. 9 volt alkaline battery included.


  • Color: White 
  • Battery Powered
  • Perfect Mount - allows for easy alignment of alarm
  • Includes mounting anchors and screws
  • End of Life Signal provides audible notification alarms needs to be replaced
  • Dust Cover


Domestic Shipping: This item is available for shipping in the U.S. except for California and to select countries outside the U.S.


SKU: 42903911
UPC: 029054000897
Brand: First Alert
Weight: 3.0 lb