All Cisco® compatible 100G/40G transceiver modules are certified for functionality, reliability and performance under rigorous testing parameters. Every 100G/40G is RoHS and MSA compliant and built with Tier 1 grade components and lasers. Each Cisco® compatible 100G/40G module is individually tested in it's intended application with identical functionality to the OEM product. All ENET 100G/40G modules are backed by an industry-leading lifetime replacement warranty and technical support.