400G QSFP112 FR4 fiber optical transceiver operates at 1310nm wavelength, supporting high-speed transmission up to 2km over single-mode fiber (SMF). Equipped with duplex LC/UPC connectors and built-in DOM function, it enables real-time monitoring of optical power, temperature, voltage and bias current. Fully compliant with industry standards, the 400G QSFP112 FR4 fiber optical transceiver is hot-pluggable, low-power and highly reliable, ideal for data center interconnection, enterprise backbone links and next-generation 400G Ethernet networks.