The AEMC 4630-300 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 300ft Kit includes the AMEC 4630 along with four 14.5" T-shaped auxiliary ground electrodes, two 300ft color-coded leads on spools (blue and red), two 100ft lead (green and black), 100 ft tape measure, one set of five spaded lugs, and carrying bag.