Delivers reliable 40 Gigabit Ethernet connections for 40GBase-LR4 compliant networks 100% Cisco compatible, equivalent to the Cisco QSFP-40G-LR4 Backed by lifetime warranty and free lifetime technical support Meets or exceeds OEM specifications and MSA (Multi-Source Agreement) industry standards Supports Digital Diagnostics Monitoring (DDM / DOM) Color: Silver TECHNICAL SPECS: 40GBASE-LR4 40 Gbps