Features 1、Multifunctional Detector: The monitor can measure carbon dioxide concentration, temperature, humidity, dew point temperature, wet bulb temperature, time and date. 2、Data Logger: Adjustable recording start and end time, and recording interval (hour minute second). 3、Easy To Observe: The image trend on the detector can more intuitively observe the trend change of carbon dioxide in different periods. 4、Portable And Lightweight: The carbon dioxide detector can be connected to WiFi and can be monitored online through APP, and can be tested at any time. 5、Audiovisual Alarm: You can set the CO2 alarm value when the concentration exceeds the set value, then the CO2 tester will sound and change the brightness. 6、Trend Data Of 80,000 Sets: Including carbon dioxide concentration, temperature, and humidity can be viewed at any time, which is a good tool for home inspection. Specification Item Type: Carbon Dioxide Recorder Material: ABS Model: ST8310A Battery: Lithium battery 18650 3.7V 1500mAh (built in) Purpose: This instrument is a special instrument for detecting carbon dioxide concentration. It adopts electrochemical sensor, which is sensitive, can set high and low alarm values, and has sound and light alarm prompts. It is suitable for industrial, agricultural and residential environments. Support Language: English Display: 2.8in FPC screen true color Carbon Dioxide: 0-20000ppm Resolution: 1ppm Accuracy: 0-10000ppm (±50ppm±3% of reading) 10000 -20000ppm (±200ppm±10% of reading) CO2 Concentration Test Range: 0-2,000% Resolution: 0.001% Accuracy: 0-1,000% (±0.005%±3% of reading) 1,000%-2,000% (±0.02%±10% of reading) Temperature ℃/℉: -20℃-125℃, -4℉-257℉ Resolution: 0.1°C, 0.1°F Accuracy: ±1℃, ±2℉ Humidity %RH: 0-100%RH Resolution: 1%RH Accuracy: ±5% Dew Point Temperature ℃/℉: -20℃-60℃, -4℉-140℉ Resolution: 0.1°C, 0.1°F Accuracy: ±1℃, ±2℉ Wet Bulb Temperature ℃/℉: -5℃-60℃, 23℉-140℉ Resolution: 0.1°C, 0.1°F Accuracy: ±1℃, ±2℉ Data Record Volume: 80,000 groups (one page is one group) Language: Chinese/English Power Supply: Built-in 18650 rechargeable battery 1500mA/h DC 3.7V (with protection board) Use Environment: Temperature range: 0-50℃ Humidity Range: 0-90%RH Air Pressure Conditions: Standard atmospheric pressure Package List 1 x Carbon Dioxide Detector 1 x USB Cable 1 x Manual