VENTECH 40 Pair (80 Pcs) Mini CCTV BNC Video Balun Transceiver Cable Screw terminal block design Full-motion CCTV video at distances up to 550m when used with any passive transceiver Support all video devices, such as camera, monitor, DVR card and recorder etc Gold Plated BNC better transmission quality long distance HD transmiter lightning proof 1000V 10/700us Easy installation, using the standard UTP cable system  Screw terminal block design Easy installation, using the standard UTP cable system