Measuring range of earth resistance : 0-2000Ω 0 / 20 / 200 / 2000ohm ± ( 2 % + 3 ) with 0.01ohm Full function protection , anti high-voltage circuit design It can be used for grounding resistance values of various power , power equipment , lighting protection equipment and other grounding , as well as AC-voltage An accurate , and easy-to-use insulation tester Large , easy-to-read lcd-display with backlights, Manufacturer: Watreketal