1. Automatic Brightness Adjustment, Automatic Calibration, Wifif Connection, Distance Sensing Wake-Up 2. Automatic Brightness Adjustment, According To The Surrounding Brightness, Automatically Adjust The Screen Display Brightness To Make The Screen Visible And Not Dazzling. 3. The Information Screen Is Energy-Saving, In The Case Of No One To Use, The Screen Can Be Automatically Turned Off To Reduce Energy Consumption, And The Sensor Can Still Transmit Data To The Cloud Through Wf When The Screen Is Turned Off, And The Real-Time Value Can Be Viewed Through The App. 4. The Temperature And Humidity Sensor Is Exposed, Which Is More Sensitive To The Surrounding Environment 5. High-Performance Chip, Capture The Weak Current Generated During The Electrochemical Reaction, Accurately Calculate The Co2 Measurement Results, Increase The Service Life, Improve The Output Efficiency, And Effectively Improve The Conversion 1. Model: PV28-AW 2. Sensor: Ndir Infrared Carbon Dioxide Sensor, Optical Sensor 3. Detection Technology: Infrared Detection Technology 4. Applicable Temperature: 0 ~ 50°C 5. Display Mode: Led Display 6. Carbon Dioxide Measurement Range: 400 ~ 5000 Ppm 7. Co2 Measurement Accuracy: ± (50 + 5% * Reading) Ppm 8. Temperature Measurement Range: 0 ~ 50°C 9. Temperature Measurement Accuracy: ±1°C 10. Humidity Measurement Range: 0 ~ 99%RH 11. Humidity Measurement Accuracy: ±5%Rh 12. Product Size: 7 x 8.4 x 3.5cm 13. Input Voltage: 5V 14. Battery Capacity: 1200mAh 15. Charging Interface: Type-C Colour:As Shown Material:ABS Package Contents: 1 x Detector 1 x Type-C Charging Cable 1 x English Manual