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A wooden box with 2 metal wheels on the bottom that controls the mouse, it was a great product as it was much quicker than the other things to move the cursor.
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Instead of metal wheels, there was a ball but it required a mouse pad.
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It was an optics model that used light instead of the ball to prevent small things inside to cause it to malfunction it required a mouse pad
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Apple made a version that didn’t need a mousepad, it was covered with transparent plastic, and the buttons were replaced
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Upgraded mouse
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Had a rolling ball that went all directions
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A mouse that could also be a flip phone
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When not used, it can be laid flat. When used, it can bend to adjust to the person's palm shape.