Fangrui Product Details 1. Trsi Ta623a Industrial Wall-mounted Thermometer Hygrometer, Built-in Probe 2. Features: 3. High-precision Temperature And Humidity Sensor: Swiss Sht C3 High-precision Sensor Is Used, With A Sampling Rate Of Up To 2 Timessecond. 4. Hidden Retractable Bracket On The Back: There Is An Independent Bracket On The Back, Which Can Be Placed On The Desktop. 5. Upperlower Limit Over-limit Prompt: The Upper And Lower Limit Alarm Thresholds Can Be Set For Temperature And Humidity Respectively. When The Measurement Is Higher Or Lower Than The Set Threshold, There Will Be A Buzzer Alarm Prompt Sound, And The Alarm Prompt Light Will Flash. 6. Four Ventilation Holes Open Windows: Allow Air To Widely Contact The Internal Sensor. 7. 13-inch Large Screen Display, Clear Reading Of Numbers. 8. Parameters: 9. Measurement Method: Built-in Probe 10. Ambient Temperature: Temperature: -20~ 80 Degrees Celsius, Accuracy: +-1.0 Degrees Celsius, Resolution: 0.1 Degrees Celsius 11. Relative Humidity: Range: 0~rh, Accuracy: +-rh, Resolution: 0 ~99(0.1)%rh, 100(1) %rh 12. Temperature Alarm Setting Range: High: -20~ 80 Degrees Celsius (-4~174 Degrees Fahrenheit), Low: -19 ~ 80 Degrees Celsius (-2.2~176 Degrees Fahrenheit) 13. Humidity Alarm Setting Range: High: 2 ~ Rh, Low: 1 ~ Rh 14. Alarm Duration Setting Range: 6 Seconds ~120 Seconds (can Be Cycled), Factory Default 6 Seconds 15. Display Mode: Led Digital Tube, Single Word 1.8 Inches 16. Sensor: Switzerland (sht C3) 17. Sampling Rate: 2 Timessecond 18. Over-range Display: Hi Or Lo 19. Operating Environment: -20~80 Degrees Celsius, Maximum Relative Humidity, Indoor Altitude Less Than 2000m 20. Storage Environment: -10~50 Degrees Celsius, Maximum Relative Humidity 21. Dimensions: 323x173x40mm 22. Weight: About 700g 23. Power Supply: Dc 5v1a