Their description:
Product Description
Maximize the performance of your iPod and your docking connector with Apple’s handy USB 2.0 interconnect. Compatible with Windows PCs only, the cable offers up to 480 Mbps data transfer for lightning-quick loading, or synching, of your entire music library to your iPod portable music player. Connect the FireWire end to the iPod power adapter to charge the unit while synching. The cable is compatible with iPods with dock connectors only…. More >>
Go & get it here - i can recommend it:
Dock Connector to USB 2.0 Cable for iPod and iPhone
when i had the ipod dock connector to usb cable, it was the best i ever used. i loved it. i used to take it to school and charge it in my technology class because it has a computer lab. i charged it to a dell pc and it charges well! but it charges faster at home. its the best for sync & charge. for $20, i would be happy to buy this off amazon.com because it is the only known website/seller that sells it. i wish i could get one for less price because this is replaceable and good for people who lost theirs or have problems with theirs. currently, my ipod mini is OFF so i have to wait a bit to make some money and buy a new one. cant wait for this!