What is Mouse?

I know telling what is mouse is so stupid, but i will tell it anyway.

-A device That controls the movement of the cursor or pointer and display on the screen.
-A small device you can roll along a hard, flat surface.
-Name is derived from its shape.
-It contains at least one button, sometimes three, sometimes more.
-It may have a scroll wheel of scrolling through aloung documents used in graphical user interface.
-Types of mouse(Mechanical Mouse, Optical Mouse)