BUFFALO LinkStation 421e Diskless Enclosure High Performance RAID NAS Personal Cloud Storage and Media Server - LS421DE Form Factor: 2-Bay Port RJ-45: 1 x 10/100/1000M Port USB: 1 x USB3.0 + 1 x USB 2.0 HDD Interface: 2 x SATA (2 x Bay) Supported Protocols: TCP / IP RAID: 0 / 1 / JBOD (Individual Disks) RAID only supported when two HDDs are inserted Power: Internal AC 100-240V Universal, 50 / 60 Hz Standards: IEEE 802.3, IEEE 802.3u, IEEE 802.3ab