This Digital Sound Noise Level Meter is designed to meet the measurement requirement of safety engineers， health， industrial safety offices and sound quality control in various environments， which include factory， office， traffic， family and audio system.Features:It is designed according to the IEC651 TYPE2 & ANSI S1.4 TYPE2Accuracy up to +/- 1.5 dBMeasurement Range: 30 - 130dBAuto backlight displayTripod Mounting optionSpecification:Measuring Range: 30 - 130 dBA；35 - 130 dBCAccuracy: ±1.5 dBFrequency Range: 31.5Hz - 8.5KHzFrequency Weighting: ADigital Display: 4 digitsResolution: 0.1dBSample Rate: 2 times/secondMicrophone: 1/2 inch electric condenser microphonePower Supply: 9V battery (not included)Package Includes:1 x Digital Sound Noise Level Meter1 x User ManualNote:  This product is certified with CE， FCC and RoHS.