Product picture - Meridian Technologies DigiFlex DT-4V2F 2F-2 4-Channel NTSC PAL Video with 2 Bi-Directional RS-422 Data System Transmitter Card Meridian, Technologies, DigiFlex, DT-4V2F, 2F-2, 4-Channel, NTSC, PAL, Video, with, 2, Bi-Directional, RS-422, Data, System, Transmitter, Card Click the image to close this page