For iPod shuffle 3rd generation / Syncing and battery charging / 3.5mm jack on one end and a USB connector on the other . The Apple iPod shuffle USB Cable connects your iPod shuffle (3rd generation) to your computer's USB port for syncing and Battery charging and to the Apple USB Power Adapter for convenient charging from a wall outlet. Two cables are included, both with a 3.5 mm jack on one end and a USB connector on the other. The shorter cable is the same length as the USB 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.