Quha Zono X User Manual page 15

Horizontal and vertical sensitivity / speed
With the sensitivity sliders you can adjust the amount of head movement
required to move the mouse cursor on the screen. You can adjust horizontal
and vertical sensitivity separately, which is useful for users whose head
movement is more limited in one of the directions. High cursor accuracy and
precision will be maintained automatically even when mouse sensitivity is
set to the maximum.
Tremor filter
The tremor filter reduces unwanted cursor movement caused by shaking.
The exact effect depends on the individual movements of each user, so you
need to try the filter to see how the different positions suit your needs.
15