According to yankodesign ”The USB Watch is a simple way of carrying your memory stick in style. A 10-minute romp with the computer charges it enough to tell you the correct time for a week. What’s more, every time you hook it up it syncs in automatically with the computer’s time. The LED display shows you the current memory status at the touch of a button. I think it’s a clever integration of functionality and utility”.
Source : yankodesign