The XP1 USB power cable is all you need to power and sync the iPhone and iPod. And with the XP1 you don’t need to carry additional adaptors and cables. Just use the USB port on your computer to charge the XP1 cable and carry the XP1 with you to power your iPhone or iPod on the go.
You can also use the wall adaptor to charge XP-1. The XP1 USB charge and sync cable has a 2500mAh lithium-ion battery. It’s a convenient solution that will always give you power when you need it.