SilverStone Technology 2 Bay External 3.5" Hard Drive Enclosure RAID / JBOD Storage Tower - USB3.0 & eSATA interfaces (TS231U) USB 3.0 and eSATA interface Up to 3TB per HDD is supported Tray less and tool-free design Built-in RAID 0,1,JBOD(Combine) Aluminum front cover