Feature:1. High Quality Material: This is a noise meter made of high quality ABS, which can make the service life longer.2. Backlight Display: The noise meter has an automatic backlight display, which is convenient for viewing in dark conditions.3. Decibel Display: The noise meter can display, measure the absolute high and low peak decibels (Maximum Minimum) and switch the display.4. Power Reminder: A noise meter with low power reminder function will automatically shut down to save power when is not used for a long time.5. Applicable Fields: The noise meter is suitable for the frequency spectrum of many different fields such as music recording, neighbor noise complaints, industrial environment, office environment, speech therapy and so on.Specification:Item Type: Noise Measure DeviceModel: GM1351Material: ABSMeasuring Range: 30-130 dBAAccuracy: ±1.5 dBDigital Resolution: 4 Digits & 0.1 dBFrequency Response: 31.5Hz ~8KHzFrequency Weighting Characteristics: A (Simulating Human Ears)Sampling Frequency: 2 Times Per SecMicrophone: 1/2in Condenser MicrophoneUsage Scenarios: Suitable for the Spectrum of Many Different Fields Such as Music Recording, Neighbor Noise Complaints, Industrial Environment, Office Environment, Speech Therapy and so on.Ship without Battery, Use a 9V 6F22 Square Battery.Package List:1 x Noise Meter 1 x User Manual Note:Please read the user manual before use, and use after you understand clearly; be careful not to use for a long time in a humid rainy environment.