StarTech.com Dell EMC QSFP-40G-ER4 Compatible QSFP+ Module - 40GBase-ER4Q Fiber Optical Transceiver (QSFP40GER4ES) - 100% Dell EMC QSFP-40G-ER4 compatible guaranteed - Lifetime Warranty on all SFP modules - Meets or exceeds OEM specifications - Our SFP modules comply w/ MSA industry standards - Low power consumption of < 1.6W - Hot-swappable w/ Single Mode modules: