Coaxial Video Ground Loop Isolator - BNC Male to BNC Female Coaxial video ground loop isolator for analog CCTV cameras. Passive, no power required. BNC male to BNC female with mini cable 15cm on both sides. Prevents video-signal distortion caused by video ground loops. Eliminates picture tearing, cross talk and rolling. Prevents power cables laid by others interfering with the CCTV system. Built in TVS ( Transient Voltage Suppressors) for surge protection.