AJ-938 ETL Smoke carbon monoxide alarm


  • Smoke and CO 2-in-1
  • 10 years of battery life
  • 10 years CO sensor
  • ETL UL217/UL2034 listed
  • Low battery warning
  • Easy installation
  • Loud 85db Buzzer
  • Aj-933
  • Aj-938
  • Aj-939
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Smoke carbon monoxide alarm

1. 2 In 1 smoke and carbon monoxide detectors, can detect both smoke and carbon monoxide, it combines smoke and carbon monoxide dual sensors in one detector

2. DC 3V built-in lithium battery with 10 years battery life, not hard-wire detector, which is convenient to install, hereby 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, that lasts for 10 years

6. 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 carbon monoxide alarm.


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

Click to check other designs of smoke and carbon monoxide alarm 

Check Video of Smoke 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


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