Tokai TC-146W Manuel D'utilisation page 27

Wave your hand over the IR SENSOR (4) again within 1 second to show the
ALARM 1 time.
Wave your hand over the IR SENSOR (4) again within 1 second to show the
ALARM 2 time.
5. In radio off mode, Press & hold the POWER SAVING button (10) for 2
seconds, "ON" appears on the display (3), the LED display will turn to
dimmer low mode after 15 seconds automatically
Wave your hand over the IR SENSOR (4) to turn the display on. Press any key
button to turn display on.
NOTE
If you replace the battery, DO NOT disconnect AC plug from AC outlet.
Otherwise, current time and alarm will be initialized.
RESETTING
If the system does not respond or exhibits erratic or intermittent operation, you
may have experienced an electrostatic discharge (ESD) or a power surge that
triggered the internal microcontroller to shut down automatically. If this occurs,
simply disconnect the ac power cord and remove the system backup battery,
wait for at least 3 minutes and then setup the unit again as if it is a brand new
unit.
RESETTING
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