13 Where is the external usb interface of Audi a4l?

13 Audi A4L has no USB interface, only sd card or aux interface. The information about USB interface is as follows: 1. USB interface: It is a serial bus standard for connecting computer systems and external devices, and it is a technical specification for input and output interfaces. 2. Application: It is applied to personal computers, mobile devices and other information communication products, and extends to other related fields such as photographic equipment, digital TV and game machines. The advantages of USB interface are: 1, hot plug: that is, users don't need to turn off the computer when using external devices, but plug in USB directly when the computer is working. 2, easy to carry: USB devices are mostly "small, light and thin", which is very convenient for users to carry a lot of data with them. 3, unified standard: common is IDE interface hard disk serial port mouse keyboard parallel port printer scanner with USB, all these application peripherals can use the same standard to connect personal computers, then there will be USB hard disk, USB mouse, USB printer and so on. 4. Multiple devices can be connected: USB often has multiple interfaces on personal computers, and several devices can be connected at the same time.