10GBase-LR SFP+ Transceiver, 10G 1310nm SMF, up to 10 km, Compatible with Intel E10GSFPLR; 10Gtek 10Gb PCI-E NIC Network Card, Dual SFP+ Port, with Original Intel X710-BM2, PCI Express Ethernet LAN Adapter Support Windows Server/Windows/Linux/ESX, Compare to Intel X710-DA2; You can get 1 Pack of 10GBase-LR SFP+ Transceiver, Compatible with Intel E10GSFPLR and 1 Pack of 10Gb PCI-E NIC Network Card, Dual SFP+ Port; Backed by 10Gtek 30 Days Free-returned, 1 Year Free Warranty and Lifetime Technical Support.