Sennheiser Set 810 S Bedienungsanleitung Seite 44

The adjustments can also be made when
the receiver is being used.
When replacing the operating control,
make sure the "projections" on the inside
of the operating control point in the
direction of the attachment clip.
After replacing the operating control,
synchronize the operating control with
the volume control by once turning it fully
in both directions.
18 SET 810 S