Griffin USB-to-Dock Connector Cable for iPod Links your 4th generation or later iPod to your PC or Mac. Carry an extra in your bag or backpack to charge and sync on the go. USB connects with your Mac or PC as well as a growing number of power products for iPod that use USB to charge. 4 feet in length. Charge and sync your iPod when you're on the go Can be used with Griffin's PowerBlock and PowerJolt iPod power products Connects with any power products for iPod that use USB to charge (4th generation and later)