This is a standalone media converter card kit, which includes the media converter card and enclosure. This is a 4G OEO converter (3R Repeater) with 2 open SFP+ slots. It provides a connection between fiber to fiber 4Gbps ethernet equipment, and functions as a fiber mode converter, or as a fiber repeater for long distance transmission. The open SFPP port slots allow users to customize between the SR, LR, CWDM, DWDM, bidirectional, or etc. connections. This can be used in telecommunication rooms, R&D laboratory, data center, or other network uses. This standalone media converter can also be used (without the enclosure) and housed in one of our rack systems for plug and play mount support. Our media converters and network interface cards are 100% compliant for all of our networking needs. Now you have a cost effective solution to your network upgrade needs.This is a standalone media converter card kit, which includes the media converter card and enclosure. This is a 4G OEO converter (3R Repeater) with 2 open SFP+ slots. It provides a connection between fiber to fiber 4Gbps ethernet equipment, and functions as a fiber mode converter, or as a fiber repeater for long distance transmission. The open SFPP port slots allow users to customize between the SR, LR, CWDM, DWDM, bidirectional, or etc. connections. This can be used in telecommunication rooms, R&D laboratory, data center, or other network uses. This standalone media converter can also be used (without the enclosure) and housed in one of our rack systems for plug and play mount support. Our media converters and network interface cards are 100% compliant for all of our networking needs. Now you have a cost effective solution to your network upgrade needs.