Super-bright display High accuracies, Measures voltage drop under full load (12A, 15A, 20A load tests). True RMS,Line Voltage, Peak Voltage,Frequency Ground to neutral voltage,Ground Impedance, Hot and neutral conductor impedances, Identifies proper wiring in 3-wire receptacles, Identifies false (bootleg) grounds, Tests GFCIs and EPDs for proper operation, Conducts testing without disturbing sensitive loads Verified isolated grounds (with 61-176 adapter