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the switch turns the mouse on or off so you don't waste the battery inside.
Sorry, there was a problem. Please try again later.It could be the slide button that turns the mouse on and off. It preserves battery usage to turn the button off.
Sorry, there was a problem. Please try again later.The only button I recall is the on/off switch.
Sorry, there was a problem. Please try again later.They don't exist for either left or right handed users on at least the newer 3500 version. Don't know anything about older versions of this. Side buttons when they exist are usually used for Aux use for other functions you want them to be.
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