100G QSFP28 ER4 optical transceiver module, support 100Gb/s and up to 40 km transmission on SM fiber, it works in high-speed IDC connection solutions, and so on. Features: 4 lanes MUX/DEMUX design Support 100GBASE-ER4 for line rate of 103.125Gbps. Integrated LAN WDM TOSA / ROSA for up to 40 km reach over SMF. Aggregate bandwidth of >100Gbps Duplex LC connectors Compliant withIEEE 802.3-2012 Clause 88 standard IEEE 802.3bm CAUI-4 chip to module  electrical standard ITU-T G.959.1-2012-02 standard· Single +3.3V power supply operating Built-in digital diagnostic functions Temperature range 0°C to 70°C RoHS Compliant Part Support FEC(Forward Error Correction)