If you have an ipad you will know that when you plug it into your pc it wont charge, this is because ipads require more power to charge.
Asus ai charger is a program that send the correct amount of power to your usb port when you have an idevice plugged in to charge it.
ASUS Ai Charger - Quick charge your iPod, iPhone and even iPad!
It is capable of charging ipads, and will charge your iphone / ipod faster than before.