Product picture - Meridian Technologies DigiFlex DR-4W4A 4A-2 4-Channel 7 MHz NTSC PAL Video with 4-Channel Bidirectional Balanced Audio Meridian, Technologies, DigiFlex, DR-4W4A, 4A-2, 4-Channel, 7, MHz, NTSC, PAL, Video, with, 4-Channel, Bidirectional, Balanced, Audio Click the image to close this page