Fangrui Product Details [ Air Quality Tester]: This Detector Can Be Used To Test And Display The Concentration Of Pm2.5, Pm10, Carbon Dioxide, Tvoc, Hcho, Temperature And Humidity At The Same Time. Real-time Detection, Automatic Refresh Data. With Alarm Function, Support Alarm Threshold Setting. [high Accurate Sensors Chip]: Uses High-precise Sensors, With High Sensitivity, Superior Interference Resistance Ability, Stable Working Performance, With Low Power Consumption. Adopts High Working Performance Chip For Accurate Data Processing. [digital Color Display]: This Air Quality Tester With A Large Digital Color Display, Display Backlight On/off Adjustment, You Can The Data Is Clearly Visible And The Screen Is Not Dazzling. [ Air Quality Level Indication Function]: Equipped With Air Quality Level Division Function, Use Different Color To Show The Different Quality Of The Air Being Monitored, Allowing You To More Accurately And More Visual Know The Current Air Conditions. [strong Heat Dissipation]: Hundreds Of Ventilation Holes R