The Y splitter is designed to connect a controller to 2 RGB 5050 LED strips. Very easy to use. Align arrows and attach a controller to single cable. Align arrows and connect a RGB LED 5050 cable to each of the Y cables. Total length of the Y splitter is 11.25 inches. Each Y cable is 5.25 inches Single cable is 5.25 inches Useful if you wish to run 2 RGB LED 5050 LED strips in opposite or parallel direction.