DC 4-20V USB Current Voltage Battery Capacity Tester LCD Display Detector 0-3A
RTZ- reset button is pressed for 3 seconds and the screen display is reset ;. OUT- The USB port where the output end is connected to the data line ;. Battery capacity display window (0-99999 mAh) ;. Current Input/output current: 0-3A, current resolution: 0.01A.