QSFP28 100GDell 100Gigabit Ethernet, coding asDell QSFP28-100G-LR4 ^^ 100GBASE-LR4QSFP28 transceiver module, 100Gbps, single mode, 1310nm, 10km, LC duplex connector, Hot Pluggable, support DOM ^^ Protocols IEEE 802.3 bm 100GBASE-SR4 and CAUI-4. Digital diagnostics functions are available via the I2C interface as specified by the QSFP28 MSA. ^^ 3 Warranty- Enjoy Fibermall 30-Days Free-returned, 65-Days Free-replacement 5-Years Free-maintenance ^^ CustomizationFibermall supports regular custom service for your options