A7 Chip- The A7 Chip with 64-bit desktop-class architecture delivers up to 2x faster performance. And the M7 coprocessor handles motion tasks to preserve battery life.
NEW 8MP iSight Camera- The world's most popular camera not only has larger pixels and a larger f/2.2 aperture. You can also shoot in burst mode, record 1080p HD video, and create slow-motion effects.
iOS 7- iOS is even easier to use with features like smarter multitasking, AirDrop, and Control Center. And it's built specifically for the 64-bit architecture in iPhone 5S.