Dimensions- 72 x 98 x 38 (Approx.)(mm). HV Test - 2KV AC (rms) for 1 min. Insulation resistance test- More than 25 Megaohms at 500 V DC . 3½ Digits, LCD Confirms to ISS : 9223/1979. Four terminals {To measure earth resistance as well as specific soil resistivity}. Low bat indication. Thermocouple K bead probe, Durable hard case,2 AA batteries Digital Earth Resistance Tester is designed to measure the resistance if earth used in power circuit