CTX Virtual Technologies The VK200 KEYFOB Virtual Keyboard - Manual (Page 35)

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The change in settings will be shown on the VK200
KEYFOB ® screen. Sensitivity can also be adjusted
through the menu. Please see the menu system for
details on adjusting brightness using the menu.
Setting Number 1 Low Sensitivity - Should be used
for high light conditions.
Setting Number 2 Normal Sensitivity - Should be
used for normal lighting conditions.
Setting Number 3 High Sensitivity - Should be used
for dark painted nails where keystrokes are not being
detected.
RESETTING
If keystrokes are not recognized after adjusting
sensitivity to the highest setting, hold the on/off
button for 5 seconds while the unit is off or press
FN and M and select menu item Advanced then
choose the menu item “Fact Reset”. This restores
the sensitivity and all settings back to factory
default settings.