4105A Digital Earth Resistance Tester Ground Resistance Voltage Meter 20/200/200Ohm Measuring Instrument Tools Batter High sensitive mini digital earth ground resistance meterSimple design,easy to operateFull function, high accuracy, dustproof and moisture-proof structureWidely used in scientific research, mobile phone maintenance, computer maintenance, electrician use, etcMeasuring range of resistance:20/200/2000Power supply:8*1.5V BatteriesProduct size:175*110*70mmNet weight:680g