TruOpto OSR5RSEDD1A 4.8mm 3.3V Flashing Red LED Diamond Lens

LED - Light Emitting Diode - a small light source

LENS - An optical element which converges or diverges light

Red - One of the three primary colours

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

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

Head - The upper part of a body typically separated by the neck.

Ideal - Something that satisfies a perfect criteria.

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