As a necessary interface for computers, USB is a universal interface. But does your USB interface belong to 2.0 or 3.0? Does it support fast charging?
In addition to transferring files and charging your phone, does your USB Type C interface support display, computer charging, and connection to an external docking station?
For another question, how do you distinguish between USB 2.0 and USB 3.0? Judging by color? Is black one USB 2.0, and blue or other colors USB 3.0. Is it determined by the number of pins? These are either not accurate enough or too complicated. In fact, you can recognize USB by the sign next to the interface. For example: SS is the meaning of SuperSpeed. So SS mark means the USB3.0 interface. Lightning sign means
that it supports shutdown charging and fast charging.
Why is the USB interface on the picture different?
Because the USB interface types are different: USB Type A is generally used in personal computers and is the most widely used interface standard. The interfaces of the above example pictures all belong to USB Type A.
USB Type B is typically used for connections to 3.5-inch mobile hard drives, printers, and monitors.
USB Type C is also widely used due to its supportion for forward and reverse insertion and optional features.
For example, if the USB Type C supports the PD protocol, the notebook can be powered;
The USB specification currently has USB 1.0, USB 1.1, USB 2.0, USB 3.0, USB 3.1, and USB 3.1 is divided into USB 3.1 GEN1 and USB 3.1 GEN2.
The theoretical transmission speed of each USB interface is as follows:
USB 1.0: 1.5 Mbps (Low Speed)
USB 1.1: 12 Mbps (Full Speed)
USB 2.0: 480 Mbps (Hi Speed)
USB 3.0: 5 Gbps (640 Mbps, Super Speed)
USB3.1: 10 Gbps