MMS4X00-NM 800Gbps Twin-port OSFP 2x400Gb/s InfiniBand and Ethernet Single Mode DR8 500m 
The MMS4X00-NM is an NVIDIA twin-port OSFP transceiver module capable of supporting up to 800Gbps data rates. It operates as 2x400Gbps links using single-mode fiber (SMF) and features MPO-12/APC connectors. The transceiver supports InfiniBand and Ethernet protocols, making it suitable for high-performance networking applications. It uses 1310nm wavelength optics and is designed for distances up to 500 meters. Two variations are available, differentiated by the module's top structure: a finned-top and a flat-top version?
NVIDIA Docs
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NVIDIA Docs
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For further details, you can consult NVIDIA's official documentation
NVIDIA Docs
s://docs.nvidia.com/mms4x00-nm-800gbps-twin-port-osfp-2x400gb-s-single-mode-dr8-500m.pdf).