1、Transmit video signals and provide power for security cameras. The cable connector is BNC+DC connector. 2、This extension cord is very suitable for you to use security cameras indoors and outdoors. 3、Easy to install, is an ideal cable for monitoring projects and small and medium‑sized security systems. 4、Each reel cable is equipped with 2 BNC to RCA adapters for easy operation and use. 5、High‑quality copper and PVC materials, has good performance, stable transmission, durability and has long service life. 4 x BNC Video Power Cable  8 x BNC to RCA Condition: 100% Brand NewItem Type: BNC Video Power CableCable Core Material: Bare Copper WireCover Material: PVCColor: BlackNumber of Cores: 3Maximum Outer Diameter of Wire: Approx. 4.0mm/ 0.2inConverter: BNC + DC HeadCover Thickness: Approx. 1.2mm/ 0.05inOptional: Approx. 10m/ 10.9yd, 20m/22yd, 30m/33ydConnection Method: The yellow wire end is connected to the camera video cable, and the red wire end is connected to the camera power supply.