Lenovo IX4-300D NAS, 12TB 4HD X 3TB (70B89002AP-R) Recertified Condition Marvell Armada XP 1.3GHz Dual Core 512MB DDR3 Memory 4 x 3.5 Easy-Swap SATA-II Hard Disk Drives JBOD, RAID 0, RAID 5 (Parity), RAID 10 (Mirroring) 2 x RJ45 10/100/1000Mbps (Gbe) Ethernet ports LAN standards: IEEE 802.3, IEEE 802.3u 1 x USB 3.0 port, 2 x USB 2.0 (to connect external HDD,UPS, Bluetooth dongle)