The Intel Ethernet SFP+ SR (Short Range - Max link distance is 300 m) Optic is a SFP+ module designed for the Intel Ethernet Converged Network Adapters (X520 family: product codes: E10G43BTDA, E10G41BFSR, E10G42BFSR, E10G41BFLR). This lead free optic module supports rates selectable 1.25 Gb/s to 10.3 Gb/s bit rates.Intel Ethernet - It just works! Optical fiber cable compatible - Spans afar and provides speedy data transmission rates between servers and network components With its thicker diameter to carry the light of multiple wavelengths, multi-mode fiber optic cable supports the high bandwidth to carry more information with greater fidelity Enjoy flexibility and scalability with data transfer rate of up to 10 Gbps with 10 Gigabit Ethernet technology With 10GBase-SR technology, enjoy up to 10Gbps data transfer rate over optical fiber cable