TruOpto OSRP3131AH-C 3mm Red / Green LED Tri-colour

LED - Light Emitting Diode - a small light source

Red - One of the three primary colours

Audio - Also known as sound. An audible vibration wave which can be heard.

Colour - The categorised spectrum of light visable to humans

Weather - is the change of an atmospheres conditions.

LED - Light Emitting Diode. A bulb that is very efficient at producing light. Often small.

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