Product picture - Meridian Technologies DigiFlex DR-4V2A2D 2A2D-SFP 4-Channel 8-Bit, 7 MHz NTSC PAL Video, 2-Channel Bidirectional Audio, and 2-Channel Bidirectional RS-232D Data System Receiver Card Meridian, Technologies, DigiFlex, DR-4V2A2D, 2A2D-SFP, 4-Channel, 8-Bit, 7, MHz, NTSC, PAL, Video, 2-Channel, Bidirectional, Audio, 2-Channel, Bidirectional, RS-232D, Data, System, Receiver, Card Click the image to close this page