Internal resistance measurement: Accuracy format: +/- ([Accuracy Percentage] + [Least Significant Number]: Range minimum resolution accuracy: 20m ohm, 0.01m ohm, 0.7% + 7 (when ZR function is enabled); 200m ohm, 0.1m ohm, 0.5% + 5; 2 ohm, 1m ohm, 0.5% + 5; 20 ohm, 10m ohm, 0.5% + 5; 200 ohm, 0.1 ohm, 0.6% + 5. In the range of 5%-95% of the gear, if it is not in this range (less than 5% of the gear range, or greater than 95% of the gear range), the error may be greater than the above accuracy. Voltage measurement: Range accuracy +/- (% reading + % range): 1V, 0.35 + 0.015; 10V, 0.30 + 0.010; 100V, 0.30 + 0.015; Positive and negative symmetry error +/- (0.012% + 5 digits). The temperature drift within the normal operating temperature (10-40C) is 100ppm/C. Tester measures resistance from 0.01m ohm to 200 ohm; The tester has a test voltage below 100V, with 4 digits after the decimal point. Color: black + red Material: plastic + metal Package Contents: 1 x tester 1 pair x probes 4 x spare probe Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture to be slightly different from the real thing. The measurement allowed error is +/- 1-3cm.