4.0 Structure appearance  
1 Input monitoring port: USB-A, 9-PIN male;  
2 Input monitoring port: TYPE-C, 24-PIN female socket;  
3 input monitoring port: Micro-USB, 5-PIN female  
socket; 4 output monitoring port: TYPE-C, 24-PIN  
female socket; 5 PD communication switch  
6 output monitoring port: USB-A, 9-PIN  
female; 7 touch switch: BACK button;  
8 Multi-function switches: left button, middle button, right  
button; 9 PC connection port: Micro-USB, 5-PIN female socket..  
7