Startech StarTech.com Dell EMC QSFP-40G-ESR4 Compatible QSFP+ Module, 40GBASE-SR4, 40GbE Multimode Fiber MMF Optic Transceiver, 40GE Gigabit Ethernet QSFP+, MPO Connector, 400m, 850nm, DDM, 40Gbps Lifetime Warranty - QSFP+ transceiver module - 40 Gigabit LAN

100% Compatibility with Dell EMC QSFP-40G-ESR4 guaranteed StarTech.com SFP modules are backed by a lifetime warranty Meets or exceeds OEM specifications and Multi-Source Agreement (MSA) industry standards Low power consumption Hot-swappable with fiber-optic modules