The earth resistance from 0.05 to 1200Ohm can be measured without the auxiliary earth spikes. (The Multiple Earthing System.) - True RMS Accurate true RMS readings of AC current including distorted waveform from 1mA to 30.0A - Noise Check Function A function to detect current, which effects on an earth resistance measurement and display "NOISE" mark on the LCD. - Memory function Save and display up to 100 measurement data. - Data hold function / Buzzer function / Back light function - Compliant with Safety Standards of IEC 61010-1 : CAT.IV 300V Pollution degree2