All 40G compatible optical transceiver modules are certified for functionality, reliability and performance under rigorous testing parameters. Every optical transceiver is RoHS and MSA compliant and built with Tier 1 grade components and lasers. Each 40G compatible fiber optic transceiver is individually tested in it's intended application with identical functionality to the OEM product. All ENET transceivers are backed by an industry-leading lifetime replacement warranty and technical support.