DSC Technology, 2 Pcs CCTV Security Camera BNC Video Balun Coax Cat5 Connection 1 PAIRS (2 pcs.) Mini CCTV BNC Video Balun with Lead Coax Cable Outstanding interference rejection and transient protection; Male BNC allows connection directly to the camera or DVR; 10%~20% wire costs saved; Full-motion CCTV video at distances up to 2000ft; No power required; Lower Cost, Easy Installation.