This copper fiber SFP module is popularly called the fiber port convert copper port module. It is a port converter that supports hot plugging and it is in the form of SFP. This connector type device is RJ45. It not only improves your short range uplinks but also adds onto the speed of uplink. Since the transmission distance of this copper module is 10-30m or 80-100m, the SFP module is mainly used for just short-distance data transmission.