QNAP TS-459U-RP+, 4x 1 TB. Processor family: Intel Atom, Processor clock speed: 1.8 GHz. Total storage capacity: 4000 GB, Hard drive capacity: 1000 GB, RAID levels: 0, 1, 5, 6, 10, JBOD. Internal memory: 1 GB, Flash memory: 512 MB. Compliance industry standards: IEEE 802.3, 802.3u, 802.3ab, Supported network protocols: TCP/IP (IPv4, IPv6), CIFS/SMB, AFP (3.1), NFS, FTP, HTTP, HTTPS, Telnet, SSH, iSCSI, SNMP, Cabling technology: 10/100/1000Base-T(X). Operating system installed: Linux