USB 3-Button Wired Optical Scroll Ball Mouse For Laptop PC - Black

USB - Universal Serial Bus

Black - A colour which does not emit any colour of the spectrum. Black absorbs all frequencies of the spectrum.

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

Button - A round or square object used for fastening clothing or other items

button - A small fastener used on clothing to secure two pieces of fabric together.

PC - Personal Computer - an electronic device for acheiving multiple electronic tasks including word processing, emails and internet access

speed - A measurement of how fast an object travels between two points

Size - is the measurement of how big an object is in space.

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

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