This is a standalone media converter card kit, which includes the media converter card and enclosure with DC Power Supply. This is a 10G OEO converter (3R Repeater) with 2 open SFP+ slots. It provides a connection between fiber to fiber 10Gbps 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.