King-Meter NOKEE - Exiting Settings

KING-METER SPECIFICATIONS OF NOKEE V1.0
7.5 Exit settings
Under setting state, briefly press (no longer than 2 seconds) to
confirm and save the current setting. Press and hold it (at least for
2
seconds) to confirm, save and exit current settings. Press
and hold it (at least for 2 seconds) to cancel the current operation
and exit without saving current settings.
Setting interface will exit automatically if the meter is
idle without any operation for 1min.