... a best choice.Having VFD dual-display with high brightness, TH1942 can synchronously display measurement parameters, such as ... dioxideMath function%, dBm, RELRangeAuto, ManualDisplayVFD,dual displayReading modeSingle display: all measurement parametersDual display: V AC+V DC, I AC ... HI, IN, LO and display, with ALARM at HI/LO (selectable)Communication interface RS232C, SCPI Digital Multimeter TH1942