doozie noun A person or thing that is remarkable, wonderful, superior, etc; beaut, humdinger: a little 30-page doozey called ''Making Chicken Soup''/ Want a swell Naval Air Station?
According to Apple Inc., the RGB signal is the standard signal for most computer graphics and video files. It is named for the colors red, green and blue. These colors, in certain combinations and intensities, can create any other color. RGB also supports grayscale, ranging from black to white.
The RGB Controller will come after the power supply and will have a DC input for power in from your DC power supply and a four port terminal or four lead wire output to send a control signal to your LED Lights. See the illustration below for reference.