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12
CONNECTING AN
EARPHONE/
HEADPHONES/
EXTERNAL SPEAKER
The
1
/
8
-inch
EXT SP
jack on the back
of the scanner lets you connect an
optional earphone (such as Cat. No.
33-175), headphones (such as Cat.
No. 20-210), or an external speaker
(such as Cat. No. 21-549).
Note:
Connecting any external de-
vice to the
EXT SP
jack automatically
disconnects the internal speaker.
Listening Safely
To protect your hearing, follow these
guidelines when you use an ear-
phone or headphones.
• Do not listen at extremely high
volume levels. Extended high-
volume listening can lead to per-
manent hearing loss.
• Set the volume to the lowest set-
ting before you begin listening.
After you begin listening, adjust
the volume to a comfortable
level.
• Once you set the volume, do not
increase it. Over time, your ears
adapt to the volume level, so a
volume level that does not
cause discomfort might still
damage your hearing.
Traffic Safety
Do not wear an earphone or head-
phones while operating a motor vehi-
cle or riding a bicycle. This can
create a traffic hazard and could be
illegal in some areas.
Even though some earphones and
headphones let you hear some out-
side sounds when listening at normal
volume levels, they still can present a
traffic hazard.
RESET
DC 12V
EXT SP
ANT
20-417.fm Page 12 Wednesday, August 4, 1999 11:33 AM