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Hello katnip, The M220 uses an infrared (IR) optical LED that is invisible to the human eye. If you're not sure whether your mouse is turned on, check the ON/OFF switch located on the bottom of the mouse. - Richard from Logitech
Sorry, there was a problem. Please try again later.No
Sorry, there was a problem. Please try again later.It doesn’t light up.
Sorry, there was a problem. Please try again later.Mine does not light up
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