Operating System : Microsoft Windows 10, WEPOS/POSReady 2009/POSReady 7, WNLPOS (Linux) Processors : G41-CPU-Desktop, Dual Core, Core 2 Duo, i3-2120, i5-2400, Intel Celeron� E1500 2.20GHz Memory Support : 1 GB - 16 GB DDR3 RAM (Model-specific) Hard Drive : Max. 2 x SATA HDD/SSD Removable Storage : N/A Expansion Slots : 2xPCI or 1xPCI, 1x PCI Express I/O Ports : 8 x USB, 32-bit/33MHz PCI, 6 Serial, PCI Express X1 Communications : 10/100/1000 Mbit/s (RJ45) Dimensions : 31 x 26.9 x 12.6 cm Weight : 6.5 kg