Features: ItisdesignedaccordingtotheIECPUB651TYPE2!#!amp!*!ANSIS1.4TYPE2 Accuracyupto+/-1.5dB MeasurementRange:30-130dB BothACandPWMsignaloutputareavailable Fastandslowdynamiccharacteristicmodes ACandDCoutputforfrequencyanalyzerleverrecorderFFTanalyzergraphicrecorderetc. ConnectwithPCthroghtUSBcableprovidesdatarecorddownloadingreal-timedatasamplinganalysisandprintinggraphdatafunctions. TripodMountingoption Specification: MeasuringRange:30-130dBA;35-130dBC Accuracy:1.5dB(referencesoundpressurestandard94dB@1KHz) FrequencyRange:31.5Hz-8.5KHz LevelRange:30-8050-10060-11080-13030-130dB LinearityRange:50dB/100dB FrequencyWeighting:A/C DigitalDisplay:4digits Resolution:0.1dB AnalogyBarGraph:1dB/1bargraph OverIndication:OVER/UNDER ACOutput:4Vrms/fullbargraphoutputimpendenceapprox.600ohm AutoPoweroff:10minuteswithoutoperation TimeWeight:FAST/SLOW Microphone:1/2inchpolarizationcapacitancemicrophone PowerSupply:4pcsAAbatteries(Notincluded) Size:250*68*34mm Netweight:315g Weight:355g PackageIncluded: 1xGM1356DigitalSoundNoiseLevelMeter 1xConnectedwire 1xUSBcable 1xCDdriver