It supports 2 to 4 channel video signals in one coaxial cable by way of Frequency Division Multiplexing, with all data transmission real-time and all images high-definition and non-delay. The video multiplexer is composed of a transmitter and a receiver. From the receiver to the transmitter, it transmits video signals through one coaxial cable to long distance. Besides, as you don’t need to install extra cable for data signals, you can save your money and time. It is suitable for improvement of old projects and building under new projects. It can be in adaptive adjust transmission distance within 0-500meters.