I feel silly asking this but was unable to find a good answer on the usb.org web site. I have a few USB cables lying around most of which are the 1.0 standard but I'm certain one or two of these must be 2.0 rated so how do I know for sure? I found under the developer's docs section of usb.org a good description of the icon and how USB 2.0 devices display a '+' symbol but as for cables it clearly states that "This guideline does not recommend use of this icon on cables and cable-connector housings." So other than plugging them in and seeing what happens how am I to know? Wanna kill these ads? We can help!