Internal resistance measurement: Accuracy : +/- ([Accuracy Percentage] + [Least Significant Number]: Range minimum resolution accuracy: 20m ohm0.01m ohm0.7% + 7 (when ZR function is enabled); 200m ohm0.1m ohm0.5%+ 5; 2 ohm1m ohm0.5%+ 5; 20 ohm10m ohm0.5%+5; 200 ohm0.1 ohm0.6%+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 the 95% of the gear range), the error may be 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 words) The temperature drift within the normal operating temperature (10 -40) is 100ppm/ Tester test resistance from 0.01m ohm---200 ohm; The tester has a test voltage 100V, with 4 digits after the decimal point. colour: 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 a little different from the real thing. The measurement allowed error is +/- 1-3cm.