Leupold GX-3i3 Operating Instructions Manual page 34

TO TURN OFF THE AUDIBLE BEEP:
1) Press POWER to activate the rangefinder.
2) Press and hold MODE for at least 1 second and then release to enter the
Quick Set Menu.
3) Press and release MODE until "bEEP" is displayed.
4) While the word "bEEP" is displayed press and release POWER as
necessary until the word "OFF" is displayed. Press MODE to save the
changes.
NOTE: Prism Lock works best in Scan Mode while pressing and holding the
POWER button.
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