TruOpto OSK5DS5A31A 5mm 5V Pink LED Flashing

LED - Light Emitting Diode - a small light source

Frequency - A term used to describe how often something is done

Frequency - A wave frequency is the number of times a wave repeats within a given time

Pink - A colour made by combining red and white

water - A chemical substance. Chemical formula H2O.

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

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