Iomega 1.5TB StorCenter Pro 250d Series + Print Server. Total storage capacity: 1500 GB, Hard drive capacity: 500 GB, Hard drive rotational speed: 7200 RPM. Memory type: DDR2 RAM, Internal memory: 1024 MB. Processor clock speed: 3200 MHz. Compliance industry standards: IEEE 802.3, IEEE 802.3u, IEEE 802.3ab, Supported network protocols: TCP/IP, AppleTalk, IPX, NetBEUI, Networking features: Gigabit Ethernet. Bundled software: Iomega NAS Discovery Software EMC Retrospect Express for PC (7.5) & Mac (v6.1), Operating system installed: Windows Storage Server 2003 R2