Features and USP: This ERT complies with the Ip 54 international safety standards for being dust proof and water proof. The tester is capable of measuring earth resistance and earth voltage and it comes with a jumbo backlit LCD display. It has a range of 0.00-20 Ω ~ 2000Ω. The instrument comes with all the accessories, battery and carry case. It is portable and easy to use in the field and even in very bad weather.