The ET600 Is A Multi-Function Megohmmeter Capable Of Producing 125V, 250V, 500V, and 1000V Test Voltages For Insulation Resistance Measurements Up to 4000M. Also Tests Ac/DC Voltages Up to 1000V With Automatic Ranging True RMS Technology. Convenient Lock Function and Built-In Stand For Hands Free Operation. Dual-Function Backlit Display Monitors Process.