Nokta Pointer User Manual page 4

If pressed again, it will revert back to the audio mode. A short
warning tone will be heard with each mode change. Nokta
Pointer will start at the same setting the next time you start up
the device.
Sensitivity Increase
Sensitivity has ten (10) levels. The factory preset is
level 5. Click the green button to increase sensitivity.
The device will indicate the sensitivity change with a
short beep each time you click the green button. When
maximum sensitivity is reached, the device will produce a long
beep.
Sensitivity Decrease
Click the gray button to decrease sensitivity. The
device will produce a short beep each time. When
minimum sensitivity is reached, the device will
produce a long beep. Nokta Pointer will start at the last adjusted
sensitivity level next time it is turned on.
Lost Alarm & Auto-Shut Off
After 5 minutes of inactivity, the pinpointer will emit an audible
alarm and LED will start flashing. After 5 minutes of alarm, the
device will shut off automatically to save battery life.