Operation Without A Battery - Sennheiser 500643 Instruction Manual

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Operation without a battery

The PXC 450 can also be used like conventional
headphones without batteries. This is appropriate if
you do not have batteries, or if the battery is empty.
To listen without batteries:
Fold the left headphone cup as inward as possible,
as indicated.
Sliding switch
Push sliding switch
Note:
– If the sliding switch
the TalkThrough and NoiseGard functions are
deactivated.
– To switch back to battery operation, return the
switch to the "normal" setting A.
is exposed.
into the "bypass" setting B.
is in the B "bypass" mode,