Product picture - Meridian Technologies DigiFlex DR-4V 1D-SFP Digitally-Encoded 4-Channel NTSC PAL Video with Return RS-232 Data Receiver Card with SFP Connector Meridian, Technologies, DigiFlex, DR-4V, 1D-SFP, Digitally-Encoded, 4-Channel, NTSC, PAL, Video, with, Return, RS-232, Data, Receiver, Card, with, SFP, Connector Click the image to close this page