Short press the U/I button. The voltage digits will start flashing.
Used to adjust values. It also acts as a button when pressed. zk5kx manual
Short press to cycle through the bottom display options (Current (A), Power (W), Capacity (Ah), and Time (h)). Short press the U/I button
To change a value, press the knob to select the digit and rotate to adjust. Long-press again to save and exit. 5. Calibration (Use with Caution) zk5kx manual
Avoid connecting the "Input -" and "Output -" wires together. This will bypass the current sensing resistor and could cause the module to fail or lose current limiting capabilities.
Short press to enter the Voltage and Current setting interface. 3. How to Set Voltage and Current