Siemens Tek

Basic functions
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Key lock
 Slide down to lock.
 Slide up to unlock.
Changing the hearing program
 Press the number of the desired hearing program.
Changing the volume
 Press to increase the volume.
 Press to decrease the volume.
Changing the SoundBalance (Treble)
 Press + (up) to get a more shrill sound.
 Press - (down) to get a more muffled sound.