This product uses a carbon dioxide sensor based on the principle of non-spectral infrared absorption. It can be used to measure the concentration, temperature and humidity of carbon dioxide. This meter is your best choice for monitoring indoor air quality (IAQ). Poor indoor air quality can cause fatigue, difficulty concentrating and even
Construction syndrome. Therefore, indoor air quality and ventilation in offices, classrooms, factories, hospitals, hotels and other places...increasing attention.

feature:
1) Using the principle of non-spectral infrared absorption, full range correction of temperature range,
2) The LCD screen displays carbon dioxide concentration, temperature and humidity at the same time.
3) Early warning of facial comfort.
4) Large-capacity 18650 lithium battery, long battery life.
5) Support USB charging mode.
6) Night light design, with high, medium and low levels to adjust the brightness of the night light.

specification:
Carbon dioxide measurement: 400PPM~5000PPM
Temperature: -10ºC~50ºC
Humidity: 0%RH~99%RH
Display mode: VA display + semi-transparent LCD protective cover
Response time: <2 minutes
Low voltage reminder: the battery low voltage symbol flashes to remind when the battery is low
Backlight: White backlight, can be turned on/off to save power
Night light: low, medium and high three levels to adjust the brightness of the night light
Power supply: Built-in 3.7VDC rechargeable lithium polymer battery, Micro USB charging port 5V input
Operating environment conditions: 0ºC~50ºC, 0%RH~85%RH
Storage environment conditions: -20 ºC~60 ºC, 0%RH ~95%RH
Atmospheric pressure: under one atmosphere
Product size: outer diameter (98mm)

Package includes: host*1, manual*1, charging cable*1

Note:

Do not bring this instrument close to your face. The carbon dioxide exhaled by the human body will affect the accuracy of the reading.