Product picture - Meridian Technologies DigiCool FT-4W1C1G 1C1G-2 4-Channel Uni-Directional Video, 1-Channel Bi-directional Contact Closure, and 1-Channel Multiprotocol Data Transmitter System Meridian, Technologies, DigiCool, FT-4W1C1G, 1C1G-2, 4-Channel, Uni-Directional, Video, 1-Channel, Bi-directional, Contact, Closure, 1-Channel, Multiprotocol, Data, Transmitter, System Click the image to close this page