This is a HP® 721073-B21 compatible 40GBase-AOC QSFP+ to 4xSFP+ direct attach cable that operates over active fiber with a maximum reach of 10.0m (32.8ft). At a wavelength of 850nm, it has been programmed, uniquely serialized, and data-traffic and application tested to ensure it is 100% compliant and functional. Our direct attach cables are built to comply with MSA (Multi-Source Agreement) standards. This direct attach cable is TAA (Trade Agreements Act) compliant. We stand behind the quality of our products and proudly offer a limited lifetime warranty.