The AEMC 4630-150 4-Point Digital Ground Resistance Meter Kit measures soil resistivity and ground resistance. Measures from 0? to 2000? with an auto-ranging feature to automatically seek out the optimum measurement range. Resists vibration, shock, and drops up to par with IEC standards. Denies high levels of interference to ensure accurate measurements. This 150 ft Kit includes the AMEC 4630 along with two 14.5" T-shaped auxiliary ground electrodes, two 150ft color-coded leads on spools (blue and red), one 30ft lead (green), 100 ft tape measure, one set of five spaded lugs, and carrying bag.