Transcom's 400G QSFP-DD series includes SR8, LR8,ER8,DR4, DR4+.DR4++.FR4,LR4,ER4 and ER4 lite, using LC or MPO receptacle, with the features of QSFP-DD MSA Compliant, IEEE802.3bs standard Compliant, low power consumption and high reliability, suitable for 400G data center ,400G Ethernet and enterprise network.