Fangrui Product Details 1. Desktop Noise Meter Temperature And Humidity Meter Decibel Meter Environmental Noise Monitor 2. Battery Capacity: 4000mah 3.7v Lithium Battery 3. Storage Function: 2 Secondspen, Can Be Stored For One Year 4. Communication With Computer: Communicate With Computer Via Usb Cable 5. Power Supply Mode: Plug-in + Charging, Dc5v 1a Type-c Usb Interface 6. Measuring Range: 30-130db 7. Accuracy: +-1.5db (based On Standard Tone, 94db@1khz) 8. Frequency Response: 31.5 Hz-8.5 Khz 9. Response Time: Fast 10. Microphone: 6mm Condenser Microphone 11. Digital Display: 3 Digits 12. Resolution: 0.1db (less Than 100db), 1db (greater Than 100db) 13. Time Display: 24-hour System 14. Temperaturehumidity Display: 2 Digits 15. Low Battery Prompt: Less Than 3.6v 16. Function: Supports Alarm Prompt (sound + Display), Alarm Function 17. Size: About 15.1 X 4.8 X 8.6cm 18. Features: 19. Capacitive Microphone Sensor, Ultra-thin Metal Vibration Film Practical Output, Instantaneous Response 20. All-round Monitoring Of Noise, Temperature, Humidity, Time (with Alarm Function) 21. Support Usb Cable To Connect To Computer, Can Read Instrument Data In Real Time, Export Excel Table 22. With The Characteristics Of Fast Response Rate, High Measurement Accuracy 23. Exceeding The Standard Sound And Light Alarm Prompt, The Indicator Light Flashes When The Alarm Is Triggered, Accompanied By A Buzzer Alarm Sound