USB/Type-C Current Voltage Tester Charging Speed Battery Capacity Monitor LCD HD Color Screen Portable Mobile Power Meter New            Product Parameters:      1. Voltage: 4~30V         2. Current: 0~6.5A        3. Timing: 0~99hours         4. mAh: 0~999999mAh        5. Power: 0~195W         6. Charging resistance: 0-999Ω        7. mWh: 0~999999mWh         8. Temperature: -9~99℃        9. Type-C Port Female: Input / Output         10. Type C Port Male: Output / Input                 Functional Instructions:        1. Click the button to change the display page. Double-click the button to rotate display content.        2. Press the button for 3 seconds to delete the charging data of timing or mWh or mAh.        3. The product has power off memory function.        4. The product has the function of bidirectional charging measurement.                 Calibration Method:        When the input and output are used interchangeably and no-load current occurs, it should be calibrated.         Calibration method: Press and hold the button and then plug it in, the product will automatically calibrate.         Note: DO NOT connect the load during calibration.