Product picture - Meridian Technologies DigiFlex DR-4V4C4D 4C4D-SFP 4-Channel 8-Bit, 7 MHz NTSC PAL Video, 4-Channel Bidirectional Contact Closure, and 4-Channel RS-232D Data System Receiver Card Meridian, Technologies, DigiFlex, DR-4V4C4D, 4C4D-SFP, 4-Channel, 8-Bit, 7, MHz, NTSC, PAL, Video, 4-Channel, Bidirectional, Contact, Closure, 4-Channel, RS-232D, Data, System, Receiver, Card Click the image to close this page