[. . . ] 1) You can select the permanent display of the room temperature or the set-point temperature. [. . . ] To change the current selection, press the + button, then press the MODE button to confirm and move on to the next setting. 5°C, then press the MODE button to confirm and move on to the next setting. 3) You can lock the keypad, in which case you cannot change the set-point or the mode, or unlock the keypad. Briefly pressing the + or - buttons will show the room temperature, and pressing the + or - buttons a second time changes the current set-point temperature by steps of 0. As soon as the battery level indicator is lit , you have approximately one month to change the batteries. Do not leave the flat batteries in the device (the guarantee does not cover damage caused by defective batteries). [. . . ] As soon as the battery level indicator is lit , you have approximately one month to change the batteries. [. . . ]