Feature: Data storage function: 99 sets of measurement results can be recorded, saving additional recording time. Accuracy clamp design: accuracy core and winding, stable, precise and anti-interference. Black matte case: more resistant to dirt and abrasion, the overall table is strong. New function selection button: The overall button sorting is neat and scientific, and the operation is more convenient. Easy to use, safe and fast: There is no need to disconnect the ground and auxiliary electrodes when measuring grounded systems with loops. Widely used in the field of electric power, telecommunications, meteorology, oil fields, construction and industrial electrical equipment, grounding resistance measurement, loop resistance measurement. Specifications: Material: Plastic Power: 4 * 6V DC Battery (Battery not included) Working temperature: -20 ° C -55 ° C Relative humidity: 10%-90% LCD display: 4-digit LCD digital display LCD size: Approx. 47*28.5mm / 1.9*1.1in Weight: Approx. 2331g / 82.2oz Size: Approx. 275*85*56mm / 10.8*3.3*2.2in Protecting level: double insulation Structural features: jaw mode Range conversion: automatic External magnetic field: <40A / m External electric field: <1V / m Single measurement time: 0.5 second Resistance measurement frequency: > 1KHz The highest resolution of resistance measurement: 0.001Ω Resistance measurement range: 0.01-200Ω Current frequency to be measured: 50 / 60Hz Can store measurement data: 99 groups Resistance alarm threshold setting range: 1-199Ω Alarm function: icon shows alarm Package list: 1 * Resistance Tester (Battery not included) 1 * Test Ring 1 * Instrument Box 1 * Instruction Manual .