Technics SC-CH404

Optional anten na connections
FM outdoor antenna (not included)
If the FM indoor antenna does not provide satisfactory reception of
FM broadcasts, use an outdoor antenna.
You may need an outdoor antenna if you use this system in a
mountainous region or inside a reinforced-concrete building, etc.
An outdoor antenna should be Installed by a competent technician
only.
FM outdoor antenna
Tuner/sound processor
LW/MW outdoor antenna (not included)
An outdoor antenna may be required in a mountainous region, or if
this system is located inside a reinforced-concrete building, etc.
Run 5 to 12 m of vinyl-covered wire horizontally along a window or
other convenient location.
Do not remove the LW/MW loop antenna.