Dual interface design: SFF-8611 OCuLink 4i male host port to SFF-8639 U. 2/U. 3 female NVMe target port, fully PCIe Gen 4.0 x4 compliant; Built-in independent SATA 15Pin auxiliary power cable, delivers stable 3.3V /5V/12V power for high-load NVMe SSD hot-swap operation; Standard 100-Ohm controlled impedance twinax wiring, suppresses signal reflection, crosstalk and attenuation for full 16GT/s bandwidth; 100-centimeter flexible length enables tidy long-distance routing inside 1U/2U server chassis and workstation motherboards; Gold-plated locking molded connectors with full multi-layer shielding, perfect for mainboard NVMe backplanes, RAID HBA cards & NVMe storage arrays