Siemens Orion M User Manual page 18

When wearing the hearing instruments, an
■
optional signal can indicate when an instrument
is turned on or off.
Remove the batteries if the hearing instruments
■
are not used for several days.
When the power-on delay is activated, the hearing
instruments turn on after a delay of several seconds.
During this time you can insert the hearing instruments
without experiencing unpleasant whistling.
The "power-on delay" can be activated by your Hearing
Care Professional.
18 Daily use