This product is composed of rails and socket adapters. Different lengths of rails can be used to install different numbers of socket adapters. At the same time, the types of adapters can be selected and can be combined at will. The socket adapter can be plugged and unplugged at any position on the track.There is no need to worry about the problem that the socket cannot be reached or the wire is to long that affects the appearance. The rails and sockets are available in gold, silver and black. When the socket adapter is rotated 90 degrees clockwise, the indicator light is on, indicating that it is powered on and cannot slide.