Video Balun enables the transmission of video using ordinary unshielded twisted pair (UTP) wire instead of coaxial cable. Cost effective and much easier for installation. UTP cable is less expensive then coax cable, One cable runs all, one pair for video, two pair for power, and you got 1 pair for spare. These Video Baluns also work over existing UTP cabling, making them perfect for use in nearly any building or across an entire campus. The cost of baluns plus Cat 5 cable may less than traditional wire. Passive devices - do not require power. Especially for high cost Plenum Coax cables. Package includes: One pair (2 pieces) of passive video baluns.