Marquardt 6425.4121 Key Switch 100mA 28V SPNO PCB Yellow LED 16mm. ..

PCB - Printed Circuit Board

LED - Light Emitting Diode - a small light source

Yellow - A primary colour. The sun is often described as yellow

Key - A physical or virtual device or code used for opening something

Red - One of the three primary colours

Telephone - A device used for communicating audio over long distances

Small - something that takes up less space than normal.

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

Dimensions - The shapes and angles of something or a situation.

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