Unitron Indigo BTE User Manual page 24

Using FM and Infrared Systems
Some FM systems consist of a teleloop worn around the
neck, which is connected to the FM receiver worn on a
belt or in a shirt pocket. To listen through the FM system,
select the telecoil program and turn on the FM receiver.
To keep the signal clear, you may need to adjust the
volume control on your hearing instruments, as well as
on the FM receiver.
With some infrared systems you may need to remove
your hearing instruments and wear the system's headset
receiver. If the volume on the infrared receiver is not loud
enough, use your hearing instruments instead.
See also "Connecting to External Audio Sources."
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