Illustration above indicating a 5mm RGB LED (Red Green Blue) with four pins. Triple output one for each color with a common cathode. This LED can be used for three status indicators or pulse width modulates all three and gets mixed colors! This pack contains 20 units of 5mm LED RGB - Common Cathode.Chip MaterialLens TypeEmittingForward Voltage(V)Dominant Wavelength(nm)Luminous Intensity(mcd)Reverse Current(uA)Viewing Angel(deg)InGaNWater ClearRed1.8/2.5615/645 200/60010 ±60InGaNWater ClearGreen2.8/4.0 455/480200/40010±60InGaNWater ClearBlue2.8/4.0500/540 300/80010±60IF=20mAIF=20mAIF=20mAVR=5VIF=20mANote: Forward Voltage (RGB): (2.0, 3.2, 3.2) V Luminosity (RGB): (800, 400,900) mcd