Gigaopto's 400G QSFP-DD series optical transceiver modules provide high-speed and high-density connections for next-generation data center and network applications, thereby increasing bandwidth and improving network performance. This portfolio includes SR8 100m, DR4 500m, XDR4/FR4 2km,LR4/LR8 10km, and ER8 40km etc. They are compliant with IEEE 802.3bs and the QSFP-DD MSA (DD = Double Density) standards. Digital diagnostics functions are available via the I2C interface, as specified by CMIS (Common Management Interface Specification). The optical transceiver is RoHS compliant.