Dahua PFM800-4K Passive Video Balun set, suitable for up to 4K / 8Mp
By using these Dahua passive video baluns you can connect the signals that normally go through the coaxial cable over a two-wire connection. You can, for example, use two cables from a network cable for bridging large distances of up to 350 meters.
This set consists of a transmitter and receiving and can be used in combination with HDCVI cameras and recorders.
With coaxial cables, an amplifier should already be used after 100 meters because the image strength has been weakened too much.