... devices, such as printer, keyboard, mouse, scanner, digital camera and so on. USB owns the functions of plugging ... 127 devices connections. There are five types of USB connectors; USB A, USB B, Mini B, Micro B, Mini A, ... A to Mini B, A to Micro B. USB cable comprises one pair of twisted signal wires, two power ... . The theory maximum transmission length of USB cable is 5.0m. Now USB 3.0 is coming, let's ...