Promotion gift of data cable
COM interface COM interface, also known as serial port, is connected to the back of desktop computers, and is currently being eliminated. The advantages are low price, support for brushing (some mobile phones can only use serial port line); the disadvantages are that it is extremely inconvenient to remove and unplug, does not support notebook computers, and the transmission speed is relatively slow. USB interface USB interface is the mainstream, the advantage is convenient, fast and stable, supporting all types of computers; [...]