Siemens TEK User Manual page 13

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.

Basic functions
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