Item Type: Carbon Dioxide Tester Material: ABS Model: ST8310A Display: 2.8in FPC Screen True Color CO2 Carbon Dioxide: 0-20000ppm Resolution: 1ppm Accuracy: 0-10000ppm (50ppm3 percent of Reading) 10000 -20000ppm (200ppm10 percent of Reading) CO2 Concentration Test Range: 0-2,000 percent Resolution: 0.001 percent Accuracy: 0-1,000 percent (0.005 percent 3 percent of Reading) 1,000 percent -2,000 percent (0.02 percent 10 percent of Reading) Temperature /: -20-125, -4-257 Resolution: 0.1, 0.1 Accuracy: 1, 2 Humidity: 0-100 percent RH Resolution: 1 percent RH Accuracy: 5 percent 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 Record 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 protection board) Use Environment: Temperature Range: 0-50 Humidity Range: 0-90 percent RH Air Pressure Conditions: Standard Atmospheric Pressure Connect WiFi detection: For IOS phone in the store, search for APP to download and install 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.