Features: brand new and high quality Intelligent carbon dioxide value tester gas analyzer adopts air semiconductor TVOC sensor to monitor temperature and humidity of air quality. The large screen displays power, CO2 value, temperature and humidity. It is a high-quality air quality detector. It adopts high-quality electrochemical detection module, with good precision, stable performance, strong anti-interference ability, low consumption and long service life. Hundreds of ventilation holes in the rear not only accelerate the convection between the air and the machine, so as to realize effective detection, but also provide good heat dissipation effect. Equipped with large screen, different font colors display different air quality, 400-1000ppm: green flash, 1001-3000ppm: Orange flash, Greater than 3000ppm: red flashing. Specifications: Material:ABS Color:Black/White Productname:carbon dioxide airguality detecto Carbon dioxide measurement:400ppm~5000ppm Resolution: 1ppm Accuracy（50ppm+5%reading） Temperature:-10.0°C-500°℃ Resolution:+1C Accuracy11°C Humidity10%RH-99%RH Resolution:19RH Accuracy.（within therangeof10%RH-90%RH）5%RH Working temperature:0°C-50°℃ Workinghumidity:20%-90%RH Sensor type:C02 sensor based on NDIR principle Response time:<2minutes Package Includes: 1 x Carbon Dioxide Air Quality Detector note: Please allow 0-3mm errors due to manual measurement, make sure that you do not mind before you order.