The 800GBASE-2FR4 QSFP-DD Optical Transceiver Module is designed for 800GBASE Ethernet throughput up to 2km over eight pairs of singlemode fiber (SMF) with Dual Duplex LC/UPC connectors. This transceiver is compliant with IEEE P802.3ck, IEEE 802.3cu, QSFP-DD MSA. This module has 2 duplex LC connectors, enabling 2 physically distinct 400G FR4 links from each 800G transceiver without the nececity of optical breakout cables. It can also be configured at half speed for 2x 200G (4×50G PAM4) or use a single port (4×100G PAM4) for 400G applications. It's suitable for 800G&400G Ethernet, Data Center, breakout 2x 400G FR4/200G FR4 applications.