Wall AC Charger USB Sync Data Cable for iPhone 4, 3GS, and iPod
I wanted this to take to work for charging my phone.  I was very disappointed.  It is useless for the my intended purpose.  While the cable works fine for charging my phone from my computer I cannot plug it into an outlet and charge because the adapter plug does not work.   The cord itself will not transfer data.  What you really get is a cheap cord for only charging your phone by attaching to your computer.