Item Type: Carbon Dioxide Tester_x000D_Material: ABS_x000D_Model: ST8310A_x000D_Display: 2.8in FPC Screen True Color_x000D_CO2 Carbon Dioxide: 0-20000ppm_x000D_Resolution: 1ppm_x000D_Accuracy:_x000D_0-10000ppm (50ppm3% of Reading)_x000D_10000 -20000ppm (200ppm10% of Reading)_x000D_CO2 Concentration Test Range: 0-2,000%_x000D_Resolution: 0.001%_x000D_Accuracy:_x000D_0-1,000% (0.005%3% of Reading)_x000D_1,000%-2,000% (0.02%10% of Reading)_x000D_Temperature /: -20-125, -4-257_x000D_Resolution: 0.1, 0.1_x000D_Accuracy: 1, 2_x000D_Humidity: 0-100%RH_x000D_Resolution: 1%RH_x000D_Accuracy: 5%_x000D_Dew Point Temperature: -20-60, -4-140_x000D_Resolution: 0.1, 0.1_x000D_Accuracy: 1, 2_x000D_Wet Bulb Temperature: -5-60, 23-140_x000D_Resolution: 0.1, 0.1_x000D_Accuracy: 1, 2_x000D_Data Record Volume: 80,000 Groups (One page is one group)_x000D_Language: Chinese/English_x000D_Power Supply: Built-In 1500mA/H 18650 Rechargeable Battery, DC 3.7V (With protection board)_x000D_Use Environment:_x000D_Temperature Range: 0-50_x000D_Humidity Range: 0-90%RH_x000D_Air Pressure Conditions: Standard Atmospheric Pressure_x000D__x000D_Connect WiFi detection:_x000D_For IOS phone in the store, search for APP to download and install_x000D_For Android phone search in the application market for APP download 1CO2 detector, can store 80,000 sets of data, and carbon dioxide concentration, temperature and humidity can be checked at any time. 2Support data recording, adjustable recording start and end time, and recording interval (hour?minute?second). 3The image trend can more intuitively observe the trend change of carbon dioxide in different periods. 4It can be connected to WiFi and can be monitored online and detected at any time through APP. 5With audiovisual alarm, can set CO2 alarm value. If concentration exceeds set value, the tester will sound and change the brightness. 6Support the measurement of carbon dioxide concentration, temperature, humidity, dew point temperature, wet bulb temperature, time, date, etc. 1 x Carbon Dioxide Tester 1 x Adapter 1 x USB Cable 1 x Manual Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.