UME2 is a classic design, broken by the intensity of the case colors. The stopper with a convex anti-slip pattern makes it easy to open the USB in any situation. After removing the plug, you can put it on the other end of the case - this gives you the assurance that it will not get lost. An ideal solution for those who like to keep their USB flash drives with them at all times is the perforation for attaching a hang tag.