The action of the Lightspeed mode is 30 cm. It works fine for me at 1.5 m (10 meters are declared), the response is satisfactory. It is convenient to switch dpi with a button, I have a 49" TV. For me, this is very important - different dpi for different applications. It's good that the case is matte plastic. My mice have been working for many years and the "rubber" will sooner or later climb around.
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