Feature: 1. Multi?functional ground resistance clamp meter, supports ground resistance test and loop resistance test. 2. It supports automatic gear shifting, when the battery voltage is lower than 5.3V, the battery voltage low sign is displayed. 3. The resistance and current alarm thresholds are adjustable and the data stored at the same time is 99 units, for easy measurement. 4. When measuring a grounding system with loops, there is no need to disconnect the ground wire without auxiliary electrodes. 5. Widely used in electric power, telecommunications, meteorology, oil fields, construction and industrial electrical equipment and other fields. Specification: Condition: 100% Brand New Item Type: Ground Resistance Clamp Meter Material: ABS+Iron Function Ground Resistance Test, Loop Resistance Test Power Supply 4 x 1.5V AA Dry Battery (Battery Not Included) Resistance Range 0.01-1200?? Current Range 0.00mA-20A Resistance Resolution 0.001?? Current Resolution 0.05mA Data Storage 99 Groups Alarm Threshold Setting Range Resistance: 1-199??, Current: 1-499mA Audible Alarm Beep-beep-beep alarm sound, the alarm symbols flashes, press the AL button to turn on, off, and set Interference Signal Recognition Function Beep-beep-beep prompt tones, NOISE symbols flashes Working Temperature and Humidity -20??-55??; 20%RH-90%RH LCD Display 4-digit LCD digital display, Size: Approx. 47x28.5mm / 1.9x1.1in Jaw Size Approx. 65x32mm / 2.6x1.3in Clamp Meter Size Approx. 285x85x56mm / 11.2x3.3x2.2in Protection Level Double Insulation Structural Features Clamp CT Shift Automatic Gear Shift External Magnetic Field 40A/M External Electric Field ??1V/M Single Measurement Time 0.5 Seconds Resistance Measurement Frequency ??1KHz Frequency of Measured Current 50/60Hz Automatic Low Battery Voltage Indication Function When the battery voltage is lower than 5.3V, the battery voltage low sign is displayed Stored Data Full Indication 99 sets of stored data are full, and the "MEM" sign flashes Over-Range Indication Over-range indication "OL??", "L0.01" or "OL A" Automatic Shut-Down The meter will automatically shut down after about 5 and a half minutes after starting up Power Consumption Startup, working current is less than 50mA, continuous working for about 30 hours . Package List: 1 x Clamp Meter (Battery Not Included)1 x Testing Ring1 x Aluminum Case1 x Manual Note: 1. Please allow 0?1 inch error due to manual measurement. Thanks for your understanding.2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.