This meter is mainly used to measure the voltage, discharge current, discharge power, discharge impedance, internal resistance, capacity, remaining power, energy consumption, running time of various types of batteries, and display measurement data through LCD. Full viewing angle LCD Screwless installation 300A range (with 300A shunt) Size: 89.6 x 49.6 x 24.25mm Display size: 51 x 30mm Current measurement range: 0-300A, less than 1A shows 999mA Voltage measurement range: 0-200V, less than 10V display 9.99V Power measurement range: 0-60000W, less than 10W display 9.99W Energy consumption measurement range: 0-9999kWh, less than 1kWh display 999Wh Impedance measurement range: 0-1000 ohm, less than 100 ohm shows 99.9 ohm Capacity measurement range: 0-1000AH, less than 1AH shows 999mAH Internal resistance measurement range: 0-999mohm, format: 999mohm Running time range: 0-999 hours, format 0:00:00-999:59 (overflow to 0) Remaining battery power: Displayed by the battery symbol, a total of 10 grids, each grid represents 10% of the electricity. colour:Black Material:Composite material Package Contents: 1 x PZEM-015 Battery Tester 1 x 300A current shunt 1 x English manual 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.