ThinkPad T400s (14.1-in WXGA+ TFT (1440 x 900) LED Backlight, Mobile Intel(R) GS45 Express chip set, Mobile Intel GMA 4500MHD, Integrated fingerprint reader, Intel Core 2 Duo processor SP9400, 250 GB / 5400 rpm HDD, DVD Recordable drive, ExpressCard slot, 2 GB memory, Intel Wireless WiFi Link 5100 AGN (1 x 2), Windows XP Professional preinstalled through downgrade rights from Genuine Windows 7 Professional, 6-cell Li-ion battery)