Function introduction: "Quick start": 1. Insert the Type-C port of Power-Z into the charging port of the mobile phone 2. Insert the charger into the C port at the bottom of the Power-Z 3. Turn on the power and start using, easily monitor charging voltage, current, power and other data<br><br>"Key Description" (from top to bottom) Button 1: Back, adjust the text display direction on the main interface Button 2: OK, adjust the data refresh frequency on the main interface Button 3: Previous page, cursor up Button 4: Next page, the cursor moves down "Precautions" 1. The QR code manual appear when you first open it, you can choose to skip it and "start using" directly 2. The current firmware version is the test firmware, there are some minor bugs that do not affect the use, please forgive me. Some unfinished features and issues be added and fixed in subsequent updates. 3. HID is a data interface, used to connect to the host computer and PC suite (for the time being only ). It can be used for 5V power supply during testing, which is more stable. Material: ABS colour: black<br><br>Package Contents: 1 x Type-C tester<br><br>Only the above package content, other products are not included. Note: Light reflection 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.