Product picture - Meridian Technologies DigiFlex DR-4V1K 1K-5 Digital 4-Channel Video Multiplexer with 1-Channel Full Duplex RS-485 System Receiver Card Meridian, Technologies, DigiFlex, DR-4V1K, 1K-5, Digital, 4-Channel, Video, Multiplexer, with, 1-Channel, Full, Duplex, RS-485, System, Receiver, Card Click the image to close this page