StarTech.com Arista Networks QSFP-40G-XSR4 Compatible QSFP+ Module, 40GBASE-SR4, 40GbE Multimode Fiber MMF Optic Transceiver, 40GE Gigabit Ethernet QSFP+, MPO Connector, 400m, 850nm, DDM - Lifetime Warranty (QSFP-40G-XSR4-AR-ST) - QSFP+ transceiver module (equivalent to: Arista Networks QSFP-40G-XSR4) - 40GbE - 40GBASE-SR4 - MPO multi-mode - up to 400 m - 850 nm