Form Factor: Desktop Port RJ-45: 1 x 10/100/1000M Port USB: 2 x USB2.0 Port eSATA: 1 x eSATA II HDD Interface: 4 x 2.5" SATA Supported Protocols: CIFS AFP FTP WebDAV iSCSI Telnet SSH NFS SNMP Operating System: Synology DiskStation Manager 3.0 Supported Clients: - Windows 2000 onward - Mac OSX 10.3 onward - Ubuntu 9.04 onward Processor: 1.6GHz