A light-emitting diode (LED) is a semiconductor light source that emits light when current flows through it. Electrons in the semiconductor recombine with electron holes, releasing energy in the form of photons. The color of the light (corresponding to the energy of the photons) is determined by the energy required for electrons to cross the bandgap of the semiconductor.

Advantages of LED:

• lower power consumption,
• longer lifetime,
• improved physical robustness,
• smaller size,
• faster switching.

Features of  RGB led 5mm with 2 pins:

• 5mm RGB Red Green Blue LED- Auto Flashing
• Clear Transparent Body Super Bright
• Unique – Auto Flashing at slow speed alternately
• Auto blink for activity/signal indication without additional circuit