CipherLab RK25 Reference Manual page 127

Physical Keypad
Note:
When Alpha Mode is on, the hot key combination (Shift + Backspace) would not work for 28-key
Model, because Backspace key becomes "Delete" in Alpha Mode. For 25-key Model, the hot key
combination (Shift + Delete) would not work.
When the keypad lock mode is triggered, all keys on the keypad will become locked to
prevent any accidental pressing of keys. A keypad lock icon will appear on the status
bar to indicate keys are currently locked.
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