The QSFP-100G-LR4-S= is a 100GBASE LR4 QSFP Transceiver from Cisco. This device features an LC connector and offers a transmission distance of up to 10km over single mode fiber (SMF). It is designed to meet the increasing demand for high-bandwidth data center interconnects. QSFP-100G-LR4-S= Specifications Model QSFP-100G-LR4-S= Product Description 100GBASE LR4 QSFP Transceiver, LC, 10km over SMF Interface 100 Gigabit Ethernet Connector Type LC Transmission Distance 10 kilometers