Product picture - Meridian Technologies DigiFlex DXB-2W2A2K-5 Bidirectional 2-Channel 7 MHz NTSC PAL Video, 2-Channel Balanced Audio, & 2-Channel 4-Wire RS-485 System Transceiver Card Meridian, Technologies, DigiFlex, DXB-2W2A2K-5, Bidirectional, 2-Channel, 7, MHz, NTSC, PAL, Video, 2-Channel, Balanced, Audio, &, 2-Channel, 4-Wire, RS-485, System, Transceiver, Card Click the image to close this page