Fangrui Product Details 1. Trsi Ta654b Large Screen Wall-mounted Noise Meter Decibel Detector Device 2. Features: 3. High-precision Microphone: High-sensitivity 12-inch Condenser Microphone With High Precision, High Sensitivity And Fast Instantaneous Response Characteristics. 4. Back Bracket Design: Hidden Bracket Design, Can Be Placed On The Desktop. 5. Upper Limit Alarm Prompt: The Upper Limit Alarm Threshold Can Be Set; When The Measurement Is Higher Than The Set Threshold, The Buzzer Will Sound An Alarm Prompt, And The Alarm Prompt Light Will Flash. The Time Can Be Set To: 6s~120s. 6. Back Panel Design: There Are 2 Ventilation Holes On The Top And Bottom, And The Response Speed Is More Sensitive. 7. Data Storage: The Instrument Automatically Stores Data Every 2s, And The Stored Value Is The Maximum Noise Value In 2s. The Instrument Can Store Data Continuously For One Year. After One Year, The Instrument Automatically Clears The Data Six Months Ago, And The User Can Export The Data Through The Computer Software. The Record Can Be Cleared (automatically Overwrite The First Half Of The Year After One Year) 8. Analog Bar Level Indication: The Six-grid Indicator Light 30~75db Displays Green, And 76~130db Displays Red. 9. Parameters: 10. Measuring Range: 30db~130db 11. Accuracy: +-1.5db (based On Standard Sound Source, 94db 1khz) 12. Resolution: 0.1db (less Than 100db), 1db (greater Than 100db) 13. Frequency Weighting: A Weighting 14. Frequency Response: 31.5hz~8.5khz 15. Sampling Rate: 2 Timessecond 16. Time Weighting: Fast 0.5 Seconds 17. Sensor Type: 6mm Condenser Microphone Sensor 18. Test Line Length: 5 Meters 19. Display Mode: Led Digital Tube, Single Word 4 Inches 20. Alarm Output: 12v High Level 21. Alarm Prompt: Sound + Prompt 22. Data Storage: Support 23. Usb Computer Communication: Support 24. Operating Environment: 0~40 Degrees Celsius, Maximum Relative Humidity, Indoor Altitude Less Than 2000m 25. Storage Environment: -10~60 Degrees Celsius, Maximum Relative Humidity 26. Dimensions: