Lenovo ThinkPad T540p 20BE003AUS 15.6" LED Notebook (Intel - Core i5 i5-4200M 2.5GHz, 500GB 7200 RPM HD, 4GB RAM, 1 Year Lenovo Warranty) Intel Core i5-4200M 2.5 GHz (3 MB Cache) 4 GB DDR3L SDRAM 500 GB 7200 rpm Hard Drive 15.6-Inch Screen, Intel HD Graphics 4600 Windows 7 Professional with upgrade to Windows 8 Pro, 7-hour battery life