The American Dynamics ADACTP01BNC AD Twisted Pair Adapter is a passive transmission device for transmitting video or video with up-the-coax dome control signals over unshielded twisted pair cables, up to a distance of 1,000 ft (300m). This adapter is compatible with all existing CCTV equipment and works with both NTSC and PAL formats. It requires no external power and allows you to get up to 4 video signals on one Cat5 cable. The adapter also features 50dB cross-talk and noise immunity.