Features: *The internal resistance battery tester is made of high quality ABS material, which is sturdy, durable and has long service life. High quality materials can bring you a good experience *The battery resistance tester can measure acid, lithium ion, lithium polymer, lithium iron , alkaline, dry battery, metal hydride, , button battery 【Function】The lithium battery resistance tester uses ZR function to measure internal resistance below 5 milliohms with higher accuracy *The maximum voltage resolution of this digital battery tester is 0.00001V, and lithium battery voltage tester can display to 0.0001V, ensuring high sensitivity. *It can measure positive and negative voltages Specifications: Item Type:Internal Resistance Tester Material :ABS Battery Lithium: battery Battery Capacity: 2000 mah Format of accuracy :±([Percentage of accuracy] [Least Significant Digit]) error:±(0.012%+ 5 digits). Package Included: 1 x Internal Resistance Tester 1 x Probe Test Line 4 x Pin 1 x Instruction Manual Note : 1 .Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real a as standard. 2.Read the manual and instructions on the back of the instrument before use. It is strictly forbidden to input AC and DC voltages higher than 100V. Note: 1. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness. 2. Please allow slight manual measurement deviation for the data.