WamBlee W420 Manuel D'instructions page 13

Deactivation
EN
To turning off your W420 it is necessary to rotate the knob (1) clockwise,
repositioning it to 'OFF'.
Press the push button (2) inwards to release the safety lock and then,
continuing to hold the push button down, rotate the knob clockwise until
the 'OFF' position is reached, then release the push button (2).
The device will be deactivated and stop emitting AIS SART ALERT
messages.
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