... NG-LO, GD-IN, NG-HI display and output. beep is adjustableTriggerInternal, manual, external (optional)InterfaceRS232C interfaceOthersDetection ... color vacuum fluorescent screen VFD display,keypad lock and data hold functionGENERAL FEATURESPower SupplyVoltage: 198V AC - 240V ... as Precise Resistance Meters, DC Resistance Meters, LCR Digital Electric Bridges, Insulation Resistance Meters, etc. The main ...