| 摘要 |
A mouse device includes a main body and a cover. The main body includes a roller wheel, a left key and a right key, wherein the roller wheel is sandwiched between the left key and the right key. The cover includes a right key cover and a left key cover to define an opening between thereof, wherein the right key cover and the left key cover are separately pivotally connected to the main body. When the cover lies against a top surface of the main body, the right key cover lies against the right key, the left key cover lies against the left key, and the opening exposes the roller wheel.
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