Panasonic KX-TCD300FXS

7.4. Screen Saver Mode
The backlight will turn off completely after 1 minute of inactivity if the handset is not on the base unit. Only essential icons and
the date and time will be displayed, and they will occasionally change position in order to preserve the life of the display.
Example:
To use the handset when it is in screen saver mode, first press [ ] to turn the display on again.
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KX-TCD300FXS / KX-TCD300FXT / KX-TCA130FXS / KX-TCA130FXT