System Interface Type: PCIe v2.1 (5.0 GT/s); Speed and Slot Width: 5 GT/s, x4 Lane.
Connector and Cable Medium: MMF 50um up to 550m; MMF 62.5um up to 275m.
[1000Base-LX/LH SFP Transceiver] Data Rate: 1.25Gb/s; Wavelength: 1310-nm; Interface: Dual LC Connectors, with DDM/DOM.
[Cabling] It supports OS1, OS2, and OS3 single-mode fiber, and supports links up to 20km using OS2 SMF Cable.
What You Get: 1x 1.25GbE network card, 2x 1000Base-LX/LH SFP transceivers, 3-year warranty and technical support.