This is a mini media converter that converts a 1x 100M/1G/2.5G/5G/10GBase-T RJ45 TO 1x SFP+ 10GBase-X 10Gigabit Ethernet, Full Duplex, Auto-Negotiation, Auto-MDI/MDIX. The Open SFP Port allows users to customize between the SX, LX, or BX connections. This media converter provides a cost effective conversion from 100M/1G/2.5G/5G/10GBase-T(RJ-45) to 10GBase-X 10Gigabit Ethernet and saving space (3.75" x 2.25" x 1"). Our media converters are 100% compliant for all of our networking needs. Now you have a cost effective solution to your network upgrade needs.