... IEC61672-1 CLASS2 2).30-130dB 3).Data Logging:32,700 Records CEM DT-8852 data logging sound level meterThis Sound Level Meter ... earphone outletAC=1Vrms ,DC=10mV/dBData output : USB data trafficData Logging:32,700RecordsAuto power off: Meter automatically shuts down after ... : Instruction manual, battery, screwdriver, 3.5mm earphone plug, windscreen, software, USB cable.Gift box with carrying case.