iphone usb power adapter Input:AC 180-270V 0.1A 50/60HZ Output:DC 5.0V 0.8A USB power adapter is for use with MP3 player with Dock Connectors including Ipod Mini,photo,shuffle and iphone. If you have a Mp3 player,Ipod series digital product,you can connect if by the USB cable or directly to SUB prot of the power adapter. Then extend the electrical prongs and plug the adapter into and electrical outlet to charge MP3 player or Ipod sereis product and battery.