This 4 Port Passive Balun Transceiver that can be used as both a receiver or transmitter.  It is a very simple unit that has 4 BNC video connectors on one side and 4 pair of screw terminals connectors for bare leads from CAT5/6 wire. Since you can use this as both a transmitter or receiver, you can do the following:

• Transmit 4 video signals between two 4 channel units – connect BNC video signals from up to 4 cameras to one transceiver, and run 4 pairs of 2-wire leads to another 4 Port Passive Balun Transceiver which will act as the receiver and connect that unit’s BNC connectors to a DVR to output video.
• Act as the receiver for 4 video signals from 4 individual balun adapters
• Act as the transmitter for 4 video signals to 4 individual balun adapters

Features

• Passive Balun Transceiver
• Can transmit or receive 4x balun video signals
• 4x Video Inputs / Outputs – 4 Screw terminal connections for wire leads coming from passive baluns or active balun transmitters connected to video source
• 4 BNC video inputs/outputs to connect to cameras or DVR
• Works with Analog Security Cameras
• Works with HD Security Cameras over Coax up to 1080P
  • HDCVI – 800ft
  • TVI – 800ft
  • AHD – 600ft
• Real time transmission without delay
• Video Transmission distance depending on camera signal resolution and signal type
• No power required – Passive Transceiver