StarTech.com Dual Bay SATA External Hard Drive Enclosure with USB 3.0 RAID 3.5-Inch Hard Drive Disk (SAT3520U3SR) Dual bay USB 3.0 enclosure supports the latest USB standard for up to 5 Gbps of data bandwidth for faster data transfers than USB 2.0 Built-in support for multiple RAID modes suit most personal/business needs for easier setup USB 3.0 RAID enclosure with a 50mm cooling fan keeps the hard drives cool over extended periods of activity, for optimized performance Dual fixed hard drive bays Supported RAID modes: 0, 1, JBOD SuperSpeed USB 3.0 compliant host interface with support for up to 5Gbps of bandwidth Power and activity LED for each drive bay 50mm cooling fan