Product picture - Meridian Technologies DigiFlex DR-2V2A4C 2A4C-2 2-Channel Video with 2-Channel Bi-directional Audio, and 4-Channel Bi-directional Contact Closure Receiver Card Meridian, Technologies, DigiFlex, DR-2V2A4C, 2A4C-2, 2-Channel, Video, with, 2-Channel, Bi-directional, Audio, 4-Channel, Bi-directional, Contact, Closure, Receiver, Card Click the image to close this page