RealSea’s 400G QSFP-DD to 8QSFP56 Direct Attach Cable (DAC) is a 8-channel parallel passive copper product for storage, data center and high performance computing connectivity. It offers 8 independent data transmitting channels and 8 date receiving channels via copper cable, an aggregate data rate of 400Gbps over 3 meters transmission can be achieved by this product.it’s high performance, cost effective I/O solutions for LAN, HPC and SAN. The high speed cable assemblies meet and exceed 400Gigabit Ethernet, InfiniBand EDR /HDR and temperature requirements for performance and reliability.