J-Tech Digital WIRED VERTICAL MOUSE - DPI Settings; Adjusting DPI Values and Gears

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There are multiple choices under DPI, Multimedia, Windows, Basic function, Advanced
function menu.
DPI settings
Default DPI:600/1200/2000/4000. DPI gears can be adjusted by checking or unchecking
the square box. DPI value can be set by pulling the DPI axis from 200 to 4000.