Book fold USB / USB

This is a concept from bookmarking your readings by fold a corner on the page, and a bright colored index label to classify documents. These materials used to assist us reading books or notes, now we use them to assist us reading data from USB!
We put a little fold on one side of the USB, which corresponds to the indentation side in the USB. Always turn this side up and you can plug in USB correctly without trying twice!
You can also find out the correct angle by a yellow index label same side with the folded corner.
It is suitable for both horizontal and vertical USB socket, no matter what type it is, just turn the yellow label upward!