Product picture - Meridian Technologies DigiFlex DR-4V2D 2D-SFP Digitally-Encoded 4-Channel Video with 2-Channel Full-Duplex Rs-232 Data Receiver Card with SFP Connector Meridian, Technologies, DigiFlex, DR-4V2D, 2D-SFP, Digitally-Encoded, 4-Channel, Video, with, 2-Channel, Full-Duplex, Rs-232, Data, Receiver, Card, with, SFP, Connector Click the image to close this page