Good Performance: True 4-wire 1Khz AC sine battery internal resistance meter, with high sensitivity and accurate measurement.Paramenter: The maximum resolution of internal resistance is 0.00001, the maximum measurement range is 200.0. Range: The maximum voltage resolution is 0.00001V, and the maximum measurement range is 9.999V.Practical Function: Use ZR function to measure internal resistance 5 milliohms, with higher accuracy and simple operation.Accurately Measures: Test lithium battery voltage can be displayed to 0.0001V, all ranges can be used for positive and negative measurement of voltage.Colour: as shownMaterial: plasticPackage Contents:1 * Battery internal resistance tester1 * Clip1 * Probe test line4 * Needles1 * 18650 Test standOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.