Lenovo Thinkpad S1 Yoga Convertible Touchscreen Ultrabook - Core i5-4300U, 8GB RAM, 180GB Solid State Drive, Windows 8.1 Professional, Wifi AC, 8 Cell Battery 4th Generation Intel Core i5-4300U Processor (2.90 GHz Turbo, 1.9GHz Base) 180GB Solid State Drive storage 8GB DDR3L memory 1600MHz Memory 12.5" HD WXGA (1366x768) Display with integrated 720p HD Camera / 8 cell Lithium Polymer Battery Windows 8.1 Professional / Intel Wireless AC 7260 with Bluetooth / 1 Year Lenovo Warranty