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We always feel troublesome to find a set of electronic equipment when we want to transfer the materials from a USB to another one.This kind of convenient USB realizes the mutual transformation of data between a USB and another. It combines USB interface, USB joint and a screen. The front end is the USB interface and the after end is the USB joint. What is more, we add a screen on the surface. When we put the screen upwards, we can insert a USB into another one precisely. In this way, even when we are in the open air, we can share our materials by inserting a USB into another one, just using our finger to sweep it.