Adopt 4-wire method which helps to the accuracy of the measured value. Digital LCD display, easy to read the measurement result. With backlight, it makes it easy to read in low light areas. True four line battery internal resistance instrument with 0-999m. accuracy: 1%. With beautiful apperance, small size, portable, you can put in your pocket wherever you go. Applicable for measurement of internal resistances of Lithium-ion, alkaline, photovoltaic inverter, battery production line,etc. Please note: the physical slightly color difference or difference, does not affect the use, please do not mind, thank you! Color: As shown Material: plastic Package Contents: 1 x host (upgraded version) 1 x Kelvin clip 1 x charging cable Only the above package content, other products are not included. Note: Light reflection 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.