All 400G compatible Direct Attach Cables (DAC) and Active-optical Cables (AOC) are certified for functionality, reliability and performance under rigorous testing parameters. Every DAC and AOC is RoHS and MSA compliant and built with Tier 1 grade components and lasers. Each 400G DAC and AOC compatible fiber optic cable is individually tested in it's intended application with identical functionality to the OEM product. All ENET DAC and AOC are backed by an industry-leading lifetime replacement warranty and technical support.