Siemens CENTRA Behind-the-Ear System - Manual (Page 13)

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Your hearing instrument specialist
can also program your hearing
system to be turned ON and OFF
using the program button.
Via the push button
To turn your hearing instrument OFF, press and hold the pro-
gram button for approximately 2 seconds.
To turn your hearing instrument ON again, press and hold the
program button for approximately 2 seconds.
Please note that when you turn your hearing instrument OFF
using the program button, you must wait approximately 10
seconds for the instrument to reset before you can turn it
back ON again using the program button.
Check with your hearing instrument specialist which ON/OFF
function your hearing system is equipped with.
Power-on delay
Your hearing instrument is equipped with a "power-on delay"
feature. This feature delays sound from entering your hearing
instrument when it is first turned on, so that you may insert
the hearing instrument into your ear without experiencing
unpleasant feedback (whistling). The "power-on delay" can
be activated by your hearing instrument specialist.