
You can see perfectly from the picture above, there’re four parts of the mouse which can control the left key, right key, rolling mode, and the trackball.

In this picture, we can see the correct way to hold this mouse. It has a ring can put onto user’s finger, and another key at the back which will turn on the high speed rolling mode.

This trackball mouse differs from the normal mouse and trackball. It’s extremely small and has special usage. This product cost about NT 700.
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