Sangean DPR-32 (V1) - Manual (Page 15)

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Key lock function
The key lock function is used to prevent unintentional operation of the radio.
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2.
Key lock switch is located on the top panel of the radio next to headphone socket.
When the key lock switch is set to LOCK, the power and volume control buttons
will be disabled. Display will show “Button Locked” icon.
To switch off the key lock function switch the key lock button to off position. The
key lock function will be disabled.