Microsoft Windows Small Business Server 2011 Premium Edition, x64, 1pk, 5DCAL, DSP, OEM, Add-on, ESP. Software type: Add-on, License type: Client Access License (CAL), License quantity: 5 user(s). Minimum hard disk space: 32000 MB, Minimum RAM: 1024 MB. Language version: ESP. Minimum system requirements: DVD-ROM, Minimum processor: 1.4 GHz