This pair of single channel passive video baluns will carry video audio and power over cat5 giving you the ability to utilize straight network cables to connect your cameras. Simply connect the BNC ends to your camera and your recording device or display connect the DC ends to a Power Supply and the Camera then connect your network cable through the RJ45 jacks; audio can be transmitted via RCA plugs. Depending on camera power draw power output cable size and environment results will vary. Average conditions allow transmission up to 1 000 ft. On longer runs video quality might be slightly reduced. DC Jacks are 2.1 x 5.5mm