Supports 4x PCIe NVMe U. 2/U. 3 SSD, up to 15mm drive height ^^ Installs into any standard external 5.25" optical drive bay ^^ Uses 4x OCuLink (SFF-8612) to connect, pin-out defined by SFF-9402 Rev 1.1 ^^ Supports PCIe 4.0 specification with transfer rates up to 64Gb/s per drive bay ^^ Supports Tri-mode controllers PCIe/NVMe pinout (Broadcom, Areca, and more) ^^ Ruggedized full-metal enclosure meeting flammability requirements ^^ Removable tray system for easy maintenance ^^ Dual high-performance 40x20mm cooling fan with three fan speed setting (High, Low, Off) ^^ Industry-leading 5 years limited warranty against all defects ^^ Complimentary support from professionally trained technical support agents