Werma Signaltechnik 816.480.53 Multi Colour LED Lamp 816 With USB. ..

USB - Universal Serial Bus

LED - Light Emitting Diode - a small light source

Colour - The categorised spectrum of light visable to humans

USB - Universal Serial Bus. A method of connecting a device to a computer

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

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