All Cisco compatible DWDM SFP+ 80km transceiver modules are certified for functionality, reliability and performance under rigorous testing parameters. Every DWDM SFP+ 80km is RoHS and MSA compliant and built with Tier 1 grade components and lasers. Each Cisco compatible DWDM SFP+ 80km module is individually tested in it's intended application with identical functionality to the OEM product. All ENET DWDM SFP+ 80km modules are backed by an industry-leading lifetime replacement warranty and technical support.