Watts BT D-01 Mode D'emploi page 18

If you want to stop the Timer function before the
end, set the duration period to "no" with (-) key.
4 Special function
4.1 Keyboards lock Function
Use this function to prevent all change of your
settings (In a child room, public area...)
- To activate the Key lock function, first press
maintain the escape key ( ) and then press
simultaneously on the edition key ( ).
- The " " logo will be displayed on the screen.
- Repeat the same procedure to unlock the key
board.
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