barigo E7 - Energy-Saving Mode

BARIGO – Makes the Difference
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2.5 Energy-saving mode
Pressing the S1, S3, S4 and S5 buttons at the same time activates
energy-saving mode. The display switches itself off completely and
all buttons are locked. In energy-saving mode, your settings as well
as the current time is retained. Pressing this key combination again
exits energy-saving mode.