When using a surveillance system at home, handling the wiring and hardware may become complicated. First, users must properly connect the video camera to the DVR or recording hard drive. Additionally, the security camera has to be plugged into an electrical outlet with a power cable. Then, the DVR must be connected to a TV, monitor, computer, router, or networking device. All of this requires knowledge of various data cable technologies such as HDMI, Ethernet, A/V, BNC, component, and others. It is also important to have sufficient cable length to make a proper connection between the camera and other devices which will be part of the surveillance system.