StarTech.com Dell EMC SFP-1G-BX80-D Compatible SFP Module - 1000BASE-BX-D - 1 GbE Gigabit Ethernet BiDi Fiber (SMF) - Dell EMC SFP-1G-BX80-D Compatible Transceiver - 1000BASE-BX WDM SFP+ (1 Gbps) - 1 Gigabit BiDi Module - 1550nmTX/1490nmRX Single Mode (SMF) - 80km (49.7mi) - LC Connector & DDM - Hot-Swappable / MSA Compliant - Lifetime Warranty