ThinkPad T400s (14.1-in WXGA+ TFT (1440 x 900) LED Backlight, Mobile Intel GS45 Express chip set, Mobile Intel GMA 4500MHD, Integrated camera, Integrated Bluetooth wireless, Integrated fingerprint reader, Intel Core 2 Duo processor SP9600, 128 GB SSD, DVD Recordable drive, ExpressCard slot, 2 GB memory, Integrated wireless Ericsson Mobile Broadband, Intel Wireless WiFi Link 5100 AGN (1 x 2), Genuine Windows Vista Business (32-bit), 6-cell Li-ion battery) Genuine Windows Vista Business (32-bit) with Windows XP Professional downgrade preinstalled