Lenovo ThinkPad Twist S230u 12.5-Inch Convertible 2 in 1 Touchscreen Ultrabook (33474HU) Black Intel Core i5 3317U 1.7 GHz (3 MB Cache) 4 GB DIMM 500 GB 5400 rpm Hard Drive 12.5-Inch Screen, Intel HD 4000 Graphics Windows 8, 5hour battery life