* CO2 Detection Range: 400ppm-5000ppm
* Tolerance: ± (50ppm ± 5% read value)
* Sensor Start Preheating Time: 150s
* Resolution: 1ppm
* Temperature Measuring Range: 0°C~50°C
* Temperature Tolerance: ±1°C
* Temperature Resolution: 1°C
* Humidity Measuring Range: 20%~99%
* Humidity Tolerance: ±5%
* Humidity Resolution: 1%
* Thermo-hygrometer Display when Out of The Measuring Range: 
  Low End: LL
  High End: HH
* MAX/MIN Records: CO2/Temperature/Humidity
* Storage Temperature: -20°C~60°C
* Storage Humidity: 20%~80%
* Other Function: 
  Comfort Indication
  MAX/MIN Alert
  Auto/Manual Calibration Function
  Time/Alarm
  Backlight Brightness Adjustment
  °C/°F Switch
* Product Net Weight: 154g