The Apple iPod shuffle USB (Universal Serial Bus) Cable connects your iPod shuffle (3rd generation) to your computers USB (Universal Serial Bus) port for syncing & battery charging & to the Apple USB (Universal Serial Bus) Power Adapter for convenient charging from a wall outlet. Two cables are included, both with a 3.5 mm jack on one end & a USB (Universal Serial Bus) connector on the other. The shorter cable is the same length as the USB (Universal Serial Bus) cable that comes with iPod shuffle. The longer cable is perfect for connecting iPod shuffle to the back of a desktop computer or to a power adapter plugged into a wall outlet.