StarTech.com Dell EMC SFP-1G-LX Compatible SFP Module, 1000BASE-LX, 1GbE Single Mode (SMF) Fiber SMF Optic Transceiver, 1GE Gigabit Ethernet SFP, LC Connector, 10km, 1310nm, DDM, Mini GBIC - Lifetime Warranty (SFP1GLXEMCST) - SFP (mini-GBIC) transceiver module (equivalent to: Dell EMC SFP-1G-LX) - 1GbE - 1000Base-LX - LC single-mode - up to 10 km - 1310 nm