The RG59/U Siamese Coax cable is the professional choice for your CCTV security camera systems installation. The RG59/U Siamese Coax provides both video and power by combining the RG59/U Coax plus one pair 18 AWG stranded power cable. The RG59/U Siamese constructions save time and money. Perfect for wiring video cameras. It's suitable for basic analog TV antenna feeds in residential applications and for basic CCTV systems. Siamese cable is convenient because it has both power and video cable independently wrapped in a single jacket so you don't have to run two separate cables. This cable is VideoSecu brand. Please report to Amazon if you receive one without VideoSecu logo. Note: This cable will not support SDI camera.