Clamp On Earth Resistance Tester Bluetooth Compatible No CAT Safety Rating CAT II 600V CAT III 300V Calibration Certificate None Current Accuracy +/-2.00 Percent Data Logger Yes Display Type Digital Dustproof No IP Rating Not Applicable Jaw Capacity 0.9 in Leakage Current Range 0.2 mA to 30 A Maximum Earth Voltage Not Applicable Maximum Ground Resistance Measurement 1 500 ohm Measurement Connectors One Clamp Minimum Ground Resistance Measurement 0.03 ohm