Operating System : Microsoft Windows XP/Windows 7, POSReady 2009, WNLPOS (Linux) Processors : Intel Atom D525, 2x1,8 GHz Memory Support : Max. 2 GB DDR3 RAM Hard Drive : 1 x SATA HD / SSD Removable Storage : Expansion Slots : 1x PCI I/O Ports : RS232 (std./ powered): 1 / 4, USB (std./ powered): 6 / max. 4, Audio, VGA, Parallel Communications : Ethernet LAN: 10/100 Dimensions : 31 x 28 x 10.3 cm Weight : 8.43 kg