The LED RGB Amplifier are required it if the load of the RGB ribbon or strips exceeds the rated output of the controller or decoder you will useThe RGB LED amplifier copies and extends the commands of your LED master controller. It is essential when lighting large areas or long projects/spaces such as a lengthy expansive bar. In a darkened room your eyes are naturally drawn to the well-lit counter and shelves of liquor. In the right settings LED lighting can impress so much more than a vase of flowers or attractive furnishings.Although the RGB LED amplifier is often used for commercial reasons its compact design makes it just as easy to apply in small homes. At only 4 ounces it's also small and light enough to store nearly anywhere.- Input: RGB- Ouput Common Anode: RGB- Output Current: 4A (each channel)- Supply Voltage: DC 12V 18V or 24V- Size: 4.49 x 2.56 x 0.98 inches- Gross Weight: 1 lbs[]