RGB LED ule consists of a plug-in full color LED made by R, G, B three pin PWM voltage. input can be adjusted section three primary colors (red/blue/green) strength in order to achieve full color mixing effect. Control of the ule with the Arduino can be achieved cool lighting effects. the use of plug-in full-color LED RGB trichromatic limiting resistor to prevent burnout through the PWM adjusting three primary colors can be mixed to obtain different colors with a variety of single-chip interface the working voltage: 5V LED drive e: common cathode driver material:metal colour:black packing:1*LED ule Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.