QSFP+ 40GJuniper QFX-QSFP-40G-ESR4 40Gigabit Ethernet, coding as Juniper QFX-QSFP-40G-ESR4 also compatible ^^ 40GBASE-ESR4QSFP+ transceiver module, 40Gbps, multimode 850nm, 400m, MTP/MPO connector, Four-channel full-duplex, Hot Pluggable, support DOM ^^ Protocols40G Ethernet, MTP/MPO optical connector Infiniband QDR, SATA/SAS3, IEEE 802.3 ba, MSA Compliant ^^ 3 Warranty- Enjoy Fibermall 30-Days Free-returned, 65-Days Free-replacement 5-Years Free-maintenance ^^ CustomizationFibermall supports regular custom service for your options