RT55SNHXU3 RAID Tower V (black color) with one 5X1 HPM-XU with eSATA / USB 3.0 interface. Install up to five 3.5" SATA hard drives of any capacity (drives not included). Drives are added or removed like tape cartridge from each drive bay with no special tool required. Connect to system via eSATA or USB 3.0 / 2.0 port (connecting cables included). Drives can be configured as RAID0, RAID1, RAID3, RAID5, RAID10, JBOD, Clone Mode using built-in hardware RAID. For more detail, please visit the product page http://www.addonics.com/products/rt55snhxu3.php