Digital Earth tester 4100 Ground resistance measurements from 0.01© to 2000© with 0.01© resolution Complete with test leads, auxiliary earth bars, heavy duty case Earth Ground Resistance 0/ 20/ 200/ 2000© ± ( 2% + 3) Earth Voltage 0~ 30V ± ( 3% + 5) Resolution 0.01© Data hold/ Low Battery Warning yes LED Indicator yes LCD Background Light yes