Lenovo ThinkPad S1 Yoga 20CD00BXUS 12.5" Touchscreen Convertible 2 in 1 Ultrabook - Full HD - Intel Core i5 i5-4300U - vPro Technology - 4 GB - 500 GB HDD - 16 GB SSD - Black - 1920 x 1080 - Windows 8.1 Pro - In-plane Switching (IPS) Technology - Front Camera/Webcam - 7 Hours Battery Run Time - IEEE