30 Pin is the original iPod/iPhone connect for older devices. The ligtening connector is much smaller andsupposadbly faster. The USB cable can normally be plugged in anyway up.
By gizmodio on 19 August 2014
There are two types one with the old 30 pin type connection and one with lightning connection(small) make sure you order the correct version the one I oredered was for the lightning connection for an iPhone5 yours will be the same.
By Michael J. Turner on 14 July 2014