DUOYI DY1200 Clamp-on Ground Earth Resistance Tester Multimeter Earth Resistance Meter 55*32mm(1.26 2.17" ) jaw size for larger ground rods Autoranging ground resistance measurements from 0.01Ohm to 1000Ohm with 0.01Ohm resolution AC Leakage current range of 10mA to 30.00A with 50A resolution Datalogging with 99 data points Configurable alarm value for resistance and current to support your measurement