NADDOD 400G OSFP DR4 single-mode parallel transceivers use a single, 4-channel MPO-12/APC optical connector with a maximum fiber reach of 100 meters. It is highly compatible with OSFP NICs, enabling interconnection to 800G switches and flexible link configuration with adaptive 200G speed reduction for 800G to 2x400G and 800G to 4x200G connections.