CO2 detector can store 80,000 sets of data, and carbon dioxide concentration, temperature, and humidity can be viewed at any time. 2. Supports data recording, and can adjust the recording start and end time and recording interval (hours, minutes and seconds). 3. Image trends can more intuitively observe the trend changes of carbon dioxide in different periods. 4. It can be connected to WiFi and can be monitored online and tested at any time through the APP. 5. It has audio-visual alarm function and can set the CO2 alarm value. If the concentration exceeds the set value, the tester will make a sound and change the brightness. 6. Supports measurement of carbon dioxide concentration, temperature, humidity, dew point temperature, wet bulb temperature, time, date, etc. Project type: Carbon dioxide tester Material: ABS Model: ST8310A Display: 2.8-inch FPC screen True color CO2 carbon dioxide: 0-20000ppm Resolution: 1ppm Accuracy: 0-10000ppm (50ppm3% of reading) 10000 -20000ppm (200ppm10% 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, 0.1 Accuracy: 1, 2 Humidity: 0 -RH Resolution: 1%RH Accuracy: 5% Dew point temperature: -20 -60, -4-140 Resolution: 0.1, 0.1 Accuracy: 1. 2 Wet bulb temperature: -5-60, 23-140 Resolution: 0.1, 0.1 Accuracy: 1. 2 Data recording volume: 80,000 groups (one page is one group) Language: Chinese/English Power supply: Built-in 1500mA/ H 18650 rechargeable battery, DC 3.7V (with protective board) Operating environment: Temperature range: 0-50℃ Humidity range: 0-90%RH Air pressure conditions: Standard atmospheric pressure Connection WiFi detection: Suitable for IOS mobile phones Search APP in the store to download and install For Android phones, search the APP in the application market to download 1 x carbon dioxide tester 1 x adapter 1 x USB cable 1 x manual