Fangrui Product Details 1. Household Noise Tester Decibel Device 2. Measurement Range: 30db - 130db 3. Ambient Temperaturehumidity: 0-60 Degrees C, 0- Rh (ta651b) 4. Accuracy: 1.5db Or So (based On Standard Sound Source, 94db 1khz) 5. Resolution: 0.1db 6. Time Weighting: Fast 0.125s, Slow 1s 7. Frequency Response: 125hz - 8khz 8. Sampling Rate: 2 Times Second 9. Analog Bar: 1 Scale Represents 2db 10. Noise Display: 4 Digits, Up To 1999 11. Microphone: High Sensitivity 12 Inch Condenser Microphone 12. Automatic Shutdown: 10min (can Be Manually Shut Down) 13. Operating Environment: -10 - 50 Degrees Celsius, Within Relative Humidity, Indoor Altitude Less Than 2000m 14. Storage Environment: -10 - 50 Degrees Celsius, Within Relative Humidity (remove The Battery) 15. Power Supply: 3 X 1.5v Aa (r03lr06) Batteries (not Included) 16. Display Size: Approx. 3.7 X 4.1cm 17. Size: About 14.5 X 5.5 X 3.3cm 18. Weight: Approx. 115g 19. Features: 20. Highly Sensitive 12 Inch Condenser Microphone With High Accuracy, High Sensitivity And Instantaneous Response 21. Can Set The Upper And Lower Alarm Thresholds, When The Measurement Is Higher Or Lower Than The Set Threshold, The Screen Red Background Light On And The Measurement Value Flashing Alarm Prompt 22. Hd Large Screen Display With White Background Light 23. Automatic Shutdown After 10 Minutes Of No Operation (can Be Manually Canceled) 24. Large Range Range 25. Packing List: 26. - Host X 1 27. - Cloth Bag X 1 28. - Instruction Manual X 1 Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.