This autoranging earth resistance clamp meter measures ground resistance and leakage current. The MS2301 has internal memory capable of storing up to 99 measurements and features a double molded conductor clamp for added protection. Includes resistance calibration loop for quick on-site verification. Features Autoranging ground resistance and leakage current measurements0.001 resolution for low resistance measurementsBasic accuracy of 0.01Internal memory stores up to 99 readingsUser adjustable alarm thresholdDisplay hold functionDurable double molded conductor clamp1.2" (30mm) jaw size for large ground rodsLow battery indicator and auto shut offCat. III 600V safety rating