Mediasonic ProRaid 2 Bay 3.5&rdquo; SATA Hard Drive Enclosure &ndash; USB 3.0 & eSATA Support 12TB & UASP Protocol (HUR3-SU3S3) Hardware embedded Raid controller ensure data integrity with redundant back up capability Support all brand of 3.5 SATA I / II / III hard drive up to 12TB per drive, and support SATA 3 6.0Gbps hard drive transfer rate USB 3.0 Transfer rate up to 5.0 Gbps, and eSATA up to 6.0 Gbps LED Light indicator for system status monitoring, and Smart Fan Function Support S.M.A.R.T. and UASP Protocol. Metal Case Material