ASUS announces the latest version of the ZenBook S (UX391FA), an ultraportable premium with Windows 10 and a diagonal of 13.3 inches, now upgraded with a more energy-efficient hardware that allows for a remarkable 20-hour autonomy, along with the newer Intel Core CPUs for improved performance. These enhancements make the ZenBook S a more appealing choice for dynamic users, always on the move, offering uncompromised effort, performance and connectivity combined with military-grade durability (MIL-STD-810G).