BUFFALO WS5400DN1204W2 12TB (4 x 3TB) NAS Port RJ-45: 2 x 10/100/1000M Port USB: 2 x USB3.0 + 2 x USB2.0 HDD Interface: 4 x SATA (4 x Bay) Operating System: Windows 8.1 (32-bit/64-bit), Windows 8 (32-bit/64-bit), Windows 7 (32-bit/64-bit), Windows Vista (32-bit/64-bit), Windows XP, Windows Server 2012, Windows Server 2012R2, Windows Server 2008, Windows Server 2008R2, Windows Server 2003, Windows Server 2003R2, Mac OS X 10.5 or later Processor: Intel Atom Processor D2550 (1.86 GHz Dual-Core) Default/ Max. Memory: 4GB RAID: RAID 0, 1, 5, JBOD Power: Power Consumption: Max 96W Power Supply: Internal AC 100-240V, Universal 50/60Hz