AJ-939 ETL Smoke & Carbon Monoxide Alarms


(1 customer review)
  • Smoke and CO 2-in-1
  • 10 years of battery life
  • 10 years of Figaro CO sensor
  • ETL UL217/UL2034 listed
  • Low battery warning
  • Easy installation
  • Loud 85db Buzzer
  • Private model
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     Smoke & Carbon Monoxide Alarms 

    1. 2 In 1 Combination Smoke/Carbon Monoxide alarm, can detect both smoke and carbon monoxide, combine two functions in one device, reduce the cost

    2. DC 3V built-in lithium battery with 10 years battery life, not hard-wire detector, be convenient to install, also can save the battery cost and install cost

    3. Big test button for easy recommended monthly testing, when you want to test the device, no need to take it off, just need a tool to press it.

    4. Low battery warning

    5.10 Year Product End-of-Service Life Warning、

    6 Figaro CO sensor from Japan, lasts for 10 years

    7. ETL certification with UL 217/UL 2034 test standard, open the business door for the USA and Canada market.



    Models of AJ-730, AJ-731, AJ-732  are the 10 years stand-alone smoke alarm

    Models of AJ-933.AJ-938, AJ-939 are the 10 years Smoke and carbon monoxide combination alarms. 

    Three different designs with the patent for your choice, which is Uniqueness.

    Click to check other designs of smoke and carbon monoxide alarm


    Additional information


    Aj-933, Aj-938, Aj-939

    technical parameter

    Working voltage DC3V bulit-in lithium battery
    Battery life 10 years
    standby current 8.2uA
    Working current ﹤60mA
    sound level 85dB
    Low battery threshold 2.5±0.1V
    Alarm mode Siren with flash(Buzzer & Red LED)
    Detect smoke and carbon monoxide
    CO Alarm concentration: 70ppm:60~240min
    Gross weight 0.295KG
    product size 135mm*35mm
    Execute Criterion UL217 / UL2034

    1 review for AJ-939 ETL Smoke & Carbon Monoxide Alarms

    1. Gordon

      product as described

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