Contour RollerMouse Red Product Manual page 8

Change Cursor Speed
Press the Cursor Speed button B to cycle through cursor speeds. There
are ten speed selections which range from slow (600 DPI) to fast (2400 DPI).
The cursor speed is indicated by the LED lights as shown.
B
600 DPI 800 DPI 1000 DPI 1200DPI 1400DPI
1600 DPI 1800 DPI 2000 DPI 2200DPI 2400DPI
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RollerMouse Red