Lenovo ThinkPad X1 (129127U) 13.3" LED Notebook - Core i5 i5-2520M 2.50GHz - 4G DDR3 160G SSD (Windows 7 Professional) - Black Intel Core i5 Processor 2.5GHz 4GB DDR3 RAM 160GB Hard Drive 13.3-Inch Screen Windows 7 Professional, 5.2 hours Battery Life