SMAKN&reg; 4 Channel Video (BNC) to UTP (RJ45) Video Balun The UPT Video Balun supports 4 video channel (BNC) One UTP Cable to carry 4 Video Signal or 4x UTP to carry 4 Video Signal with Camera Power Adopt different signal transmission with excellent anti-jamming ability Passive Device ( no power required ) Size of the Video Balun: 17.4cm long Approx(include cable)