OWC / Other World Computing Thunderbay 4 Mini 4-Bay Drive Enclosure with Dual Thunderbolt 20Gb/s Ports, Raid-Ready OWC / Other World Computing Thunderbay 4 Mini 4-Bay Drive Enclosure with Dual Thunderbolt 20Gb/s Ports - High-Quality Certified Double-Shielded 1m Thunderbolt Cable - External UL Listed 3-Prong Power Cable - 2 Keys for Front Panel Lock - Utility software Bundle for Mac and PC - User Guide - OWC / Other World Computing 1 Year Limited Warranty Chipset: Thunderbolt 2 Interfaces Supported: Thunderbolt 2 Interface Transfer Rate: 20 Gb/s Drive Mechanisms Supported: 4x 2.5" SATA III 6 Gb/s 0.6"/15mm drives