Silverstone Tek Dual Bay USB 3.0 SuperSpeed 3.5-Inch External Hard Drive Enclosure with RAID (DS322B) 5Gbps SuperSpeed USB 3.0 connection Configurable RAID 0/1 and Non-RAID modes Elegant front cover and aluminum outer shell Support 2 x 3.5-Inch SATA SSD or HDD Maximum 3Gbps data transfer speed via SATA II interface Backwards compatible with USB 2.0 Hi-Speed connection (480Mbps) Compact and screw-less design for easy HDD installation