Sangean DT-120CL, User Manual, Page: 11 / 63

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System Lock
To prevent accidental changing of any of the
radio settings. Switch the Lock switch to
Lock position. LCD display lock icon will
appear. To release, simply switch the Lock
switch to its opposite position, LCD display
lock icon will disappear.
It’s important to make sure Lock switch is in
its off position when radio is to be operated,
as radio is completely inoperative until Lock
Switch is released.