Features 1. Features: CO2, temperature, humidity detection 2. CO2: it is commonly present as a compound in the atmosphere, accounting for about 0.04% (400 ppm) of the volume of the atmosphere, and usually produced in burning of organic compounds, the respiratory action of cells, the fermentation of microorganisms, etc. The carbon dioxide in indoor environment is mainly from human breathing. 3. Good accuracy, stable performance, strong anti-interference ability, low consumption and long service life. Accurately detect carbon dioxide. The large screen displays power, CO2, temperature and humidity. Specification 1. Features: CO2 concentration/temperature/humidity detection 2. Detection Technology: Non-dispersive infrared 3. Detection Method: CO2 gas sensor/temperature and humidity sensor 4. Range Of Application: 400~5000PPM 5. Unit: PPM/ degree C/%RH 6. Tolerance Of Accuracy: - CO2 concentration: +/- (50ppm+5%*Readings) - Humidity: +/- 2%RH - Temperature: +/- 0.3 degree C 7. Power Supply: USB/lithium battery 8. Response Time: Less than 120S 9. Value Update Time: Less than 3S 10. Battery Capacity: 1600mAh 11. Dimensions Of Product: 90X80X40 mm 12. Net Weight: 113g 13. Dimensions Of Display: 84 X 74 mm 14. Display Mode: Digital display 15. Operating Temperature: -10 degree C~+50 degree C Package List 1. Detector x 1 2. USB cord x 1 3. Manual x 1 4. Qualified Certificate x 1