WamBlee W420 Manuel D'instructions page 10

Operation
EN
Before wearing the device it is recommended that you proceed with a test
of your W420 AIS MSLD to ensure it is working properly; test procedures
are described in the 'Functional Test' section of the manual.
How to "arm" your W420 AIS MSLD
To ensure that your device is ready for activation, the knob (1) must be set
to the 'ARMED' position.
Press the push button (2) inwards to release the safety lock. Then, keeping
the push button pressed, rotate the knob anticlockwise until it reaches the
'ARMED' position, then release the push button (2).
Your W420 is ready to be activated in the event of an emergency.
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