Fangrui Product Details 1. Aneng Sound Decibel Tester Volume Sound Level Noise Meter 2. Material: Abs 3. Sampling Rate Fast: 125ms 4. Sampling Rate Slow: 1sec 5. Noise Accuracy: +2db 6. Frequency Response Range: 30hz-8khz 7. Resolution: 0.1db 8. Frequency Weighting: A Weighting 9. High-sensitivity Condenser Microphone, Test Range 30-130db 10. Lcd High-definition Backlight Large Screen, Long Press The Hold Key To Turn On The Screen Light, Even In A Dark Environment, You Can See The Screen Value Clearly, Even In Backlight 11. Smooth Feel, Small Size, Lighter And More Comfortable, Smooth Lines, Ergonomic 12. Data Can Be Retained On The Screen For Recording 13. The Meter Uses 2 X Aaa 1.5v Batteries, Which Are Easy To (not Included) 14. Sensitively Capture Environmental Noise, High-precision And Fast Measurement 15. Dual Mode Switching, Adjustable Sensitivity, Indoor And Outdoor Environmental Noise Sampling Frequency, Fastslow Time Entry, One-button Switching 16. High-precision Noise Meter, A-weighted Frequency Real-time Detection Of Environmental Noise Felt By The Human Ear, Real-time Data 17. Sponge Windshield, Sponge Structure Effectively Absorbs Wind Noise, Reduces The Impact Of Airflow On The Sensor, And Ensures That The Noise Meter Can Still Output Stable Values Outdoors Or In Strong Wind Environments 18. The Instrument Will Automatically Turn Off The Power About 15 Minutes After Powering On To Prevent Forgetting To Turn Off The Power After Using The Instrument, Saving Power And Worrying 19. Weight: 53 Grams 20. Size: 16.3x2.7 Cm