The OWC Flex 1U4 is a highly flexible professional-grade 4-bay Thunderbolt storage and docking solution for gaining powerful new rackmount workflow possibilities. Use a mix of 2.5 or 3.5-inch SATA/SAS and U.2/M.2 NVMe drives in the hot-swappable drive bays. Connect gear and charge mobile devices with Thunderbolt and USB ports. Add an audio/video capture, 10Gb Ethernet networking, SSD storage, hardware RAID card, or I/O card to the PCIe slot.