The Power-Z USB PD Tester KM001 is a powerful diagnostic tool that can be used to measure voltage, current, and other parameters of USB Type-C devices. Here are the steps to use the Power-Z USB PD Tester KM001: Connect the Power-Z USB PD Tester KM001 to your computer or USB charger using the Type-C male to Type-C male cable. Plug the USB device you want to test into the Type-C female port of the Power-Z USB PD Tester KM001. Turn on the Power-Z USB PD Tester KM001 by pressing and holding the power button for about 3 seconds until the screen lights up. The main screen of the device will display the voltage, current, and other parameters of the USB device you plugged in. You can use the button on the side of the Power-Z USB PD Tester KM001 to switch between different screens to view more detailed information about the USB device. If you want to set a limit for the voltage or current of the USB device, you can press and hold the button on the side of the Power-Z USB PD Tester KM001 to enter the settings menu. Use the arrow keys to navigate to the "Limit" option, and then use the number keys to set the desired voltage or current limit. Once you have set the limit, press the button again to exit the settings menu. Overall, the Power-Z USB PD Tester KM001 is a versatile tool that can be used to measure and monitor the performance of USB Type-C devices. With its easy-to-use interface and comprehensive range of features, this device is a must-have for anyone who needs to diagnose and troubleshoot USB devices.