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# PRE-QSFP56DD-VR4

The PRE-QSFP56DD-VR4 is a 400G QSFP-DD transceiver designed for short-reach applications over multimode fiber (MMF), supporting 850nm VCSEL technology, MPO-12 connectivity, and up to 50 meters for high-density data center and enterprise environments.

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**QSFP-DD, VR4, 850nm, 400G, 50m, MMF/MPO12-APC**

The PRE-QSFP56DD-VR4 is a 400G QSFP-DD transceiver operating at 850nm over multimode fiber (MMF) with an MPO12-APC connector, supporting high-speed data transmission up to 50 meters for short-reach data center applications.

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The PRE-QSFP56DD-VR4 is a high-performance 400G QSFP-DD transceiver designed for data centers and enterprise networks, delivering reliable short-reach connectivity over multimode fiber (MMF). Compliant with 400GBASE-VR4 Ethernet, IEEE 802.3bs/802.3db, and the QSFP-DD MSA, it supports seamless integration into next-generation network architectures. Featuring CMIS 4.0, a Class 1 laser, and full RoHS compliance, this module ensures safe, standards-based, and environmentally responsible high-speed operation.