The BNC-100 CCTV Video and Power Cable is one item offered by Security Camera King (SCK) that combines two functions into one unit.  This cable provides the means for both video transmission from the digital video security camera to the Digital Video Recorder or DVR and the power supply from the power distribution box or plug-in transformer to the camera.

Video transmission signals are a special type of radio frequency signal.  These signals can be transported in many different ways.  For example, digital video cameras can send the video transmissions wirelessly using on-board transmitters and antennas to corresponding wireless receivers.  The other option involves using wires or cable.