BakkerElkhuizen RollerMouse Red Plus - Manual (Page 7)

Click force refers to how hard or soft it is to click the Rollerbar.
To change the click force, press and hold both the and the
button for two seconds, the LED light will show current click
force setting. While continuing to hold button release button
and use scroll wheel to change click force setting. Let go of
to select click force setting.
Note: The Rollerbar click function can be turned off using the above
adjustment method, by moving the scroll wheel until all LEDs are lit.
7
Press button to change cursor speed. There are five speed
selections from slow to fast that are indicated by the LEDs.
Changing cursor speed Rollerbar click force adjustment