VENTECH NEW CCTV 4 Ch Video Balun 4 ch Gold Plated BNC HD Pasive Transceiver RJ45 CAT5 Cable Pair extra Gold Plated BNC Video Balun (better transmission quality) long distance HD transmiter 4 Channel Transmission ,Support all video devices, such as camera, monitor, DVR card and recorder etc. 400m(work with Passive products) & 1000m(work with Active products) lightning proof 2000V 10/700us Easy installation, using the standard UTP cable system Super antijamming capability