Sound level meter +usb sanfix GM 1358

Digital Sound Level Meter GM1358 Measuring Range 30 130dBA, 35 130dBC Accuracy 1.5dB Digit & Resolution 5 digit & 0.1dB Frequency Response 31.5Hz 8.5KHz Measuring Level 30 130, 40 90, 50 100, 60 110, 80 130 Frequency Weighting Characteristic A & C Time Weighting FAST/SLOW Sampling Rate 2 Times/Second Microphone inch polarization capacitance microphone AC/DC Output (AC/DC)  Overload Indication OVER/UNDER Low Battery Indication Unit Size 70*29*207mm Standard Quantity Per Carton 20PCS Standard Carton Size 67.5*45.8*30.2mm Standard Carton Gross Weight 17.1Kg Power 9V battery or DC 9V 100mA adapter