The LP-2811 unit has a loop impedance spectrum L - E , L - N: 20/200/2000 Ohm on auto-range and a testing current of 12 A at 230 V/50 Hz. There is a voltage analysis of L-N, L-E : 80 to 250 V AC/50 Hz, and a earthing wired path return resistance of 20/200/2000 Ohm on auto-range. A 20/200/2000 Ohm auto-range neutral and live wire resistance and transformer coils. It has a peak PSC Current (L - N) of nearly 3 kA, working voltage of 230 V +/-20%Hz. The device has 170(L) x 120(W) x 95(D)mm measurements with a 635 g weight, and a power supply of 8 AA 1.5V Batteries.