Fangrui Product Details 1. Temperature Humidity Meter Digital Dew Point Thermometer 2. Temperature Range: -40 - 80 Degrees Celsius -40 - 176 Degrees Fahrenheit; Accuracy: About 0.5 Degrees Celsius About 1 Degree Fahrenheit 3. Humidity Range: 0- Rh; Accuracy: About Rh (10- Rh) About Rh (other Ranges) 4. Sensor: Shtc3 5. Sampling Rate: 10 Timess 6. Update Speed: 3 Timess 7. Recording Length: Open Record From Rec, Display Up To 99 Hours 8. Data Storage: Ta622a: 8000, Ta622b: 4000 9. Usb Computer Communication: Ta622b Has Real-time Measurement Records + Host Record Data Upload 10. Automatic Shutdown: 15 Minutes (can Be Manually Shut Down) 11. Operating Environment: -10 - 50 Degrees Celsius, Within Relative Humidity, Indoor Altitude Less Than 2000m 12. Storage Environment: -10 - 50 Degrees Celsius, Within Relative Humidity (remove The Battery) 13. Power Supply: 3 X 1.5vaa (lro6) Batteries (not Included) Usb Micro Interface 5v 14. Display Size: About 5.3 X 4.4cm 15. Size: About 21.8 X 6.7 X 3.5cm 16. Weight 190g 17. Features: 18. Four Parameters Measurement, Ambient Temperature, Ambient Humidity, Dew Point Temperature, Wet Bulb Temperature, Can Display Two Lines Of Data At The Same Time 19. High Precision Temperature And Humidity Sensor 20. Upperlower Limit Exceeds The Limit Prompt: Temperature And Humidity Can Set The Upper And Lower Limit Alarm Threshold; When The Measurement Is Higher Or Lower Than The Set Threshold, There Will Be A Buzzer Alarm Prompt Sound, As Well As Alarm Prompt Light Flashing 21. Va High-definition Color Screen Display With Background Lighting 22. Two Power Supply Modes: Battery And Usb Interface 23. Data Logging Records: 24. - Interval Length Can Be Set To: 5s10s30s60s30min60min12h24h, A Total Of 8 Gears 25. - Ta622b Can Export And Generate Charts By Communicating The Data Recorded By The Host Computer With The Pc Software Through The Usb Interface 26. Usb Computer Communication (only Ta622b) Has The Ability To Download Recorded Da