StarTech.com Dell EMC SFP-1G-BX80-U Compatible SFP Module, 1000BASE-BX-U, 1 Gigabit Ethernet Bi-Directional (BiDi) Fiber Single Strand SFP, LC 80km, Mini GBIC Transceiver Module, Upstream - Lifetime Warranty (SFP1GBX80UES) - SFP (mini-GBIC) transceiver module (equivalent to: Dell EMC SFP-1G-BX80-U) - 1GbE - 1000Base-BX80-U - LC single-mode - up to 80 km - 1490 (TX) / 1550 (RX) nm