The ET-3000 is an earth resistance tester from LUTRON, suitable for a variety of earth resistance and earth voltage measurements. This device is accurate and reliable, and is made to last. FEATURES * Earth Resistance and Earth Voltage measurement. * 3 ranges for earth resistance measurement 19.99 ohm, 199.9 ohm, 1.999 K ohm. * 0 to 199.9 V for earth voltage measurement. * 18 mm, large size LCD display. * Data hold. * Built-in over input indication. * Durable & portable housing plastic case with the front protective cover. * Complete testing accessories included.