... , REL functionComparator1 group record, NG-LO, GD-IN, NG-HI display and output. beep is adjustableTriggerInternal, manual, external (optional)InterfaceRS232C interfaceOthersDetection ... of damage test wire,four-color vacuum fluorescent screen VFD display,keypad lock and data hold functionGENERAL FEATURESPower SupplyVoltage: 198V AC - 240V ...