Follow come apple designed to be the perfect traveling companion, the adapter has a clever design which allows the dc cable to be wound neatly around itself for easy cable storage. an ac cord is provided with the adapter for maximum cord length, while the ac wall adapter (also provided) gives you an even easier and more compact way to travel compatible with macbook pro with 13-inch retina display. power adapter for apple macbook pro with 13-inch retina display magnetic connection to computer breaks cleanly when tripped over to prevent accidents led light provides status information compatible with macbook pro with 13-inch retina display this adapter allows the dc cable to be wound neatly around itself for easy cable storage