PCIe Gen4, 2.5” 8bay U.3 Active JBOF w/300 watt PSU. 48 lane Broadcom Atlas switch which is configured for 2×2 PCIe/NVMe SSD devices. CLI for controlling power/on off to individual slots, etc (see manual). These enclosures are PCI-SIG compliant. They are to be used with the PCI4-4444SE2 cables