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QSFPP-40GBASE-LR4-ACC is a 40GBASE-LR 10km SMF 1310nm QSFP+ Transceiver, generic for Arista QSFP-LR4. It is guaranteed compatible for all Arista switch and router product lines. This transceiver can be mixed and deployed with Arista OEM transceivers for seamless network performance and interoperability.