Radio Shack PRO-90 ユーザーズマニュアル
13
CONNECTING AN EARPHONE/
HEADPHONES
HEADPHONES
For private listening, you can plug an earphone or head-
phones with a
phones with a
1
/
8
-inch mini-plug (such as Cat. No. 33-
175 or 20-210) into the
jack on top of your scanner.
This automatically disconnects the internal speaker.
Listening Safely
To protect your hearing, follow these guidelines when you
use an earphone or headphones.
use an earphone or headphones.
• Do not listen at extremely high volume levels.
Extended high-volume listening can lead to perma-
nent hearing loss.
nent hearing loss.
• Set the volume to the lowest setting before you
begin listening. After you begin listening, adjust the
volume to a comfortable level.
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 vol-
ume level that does not cause discomfort might still
damage your hearing.
ume level that does not cause discomfort might still
damage your hearing.
Traffic Safety
Do not use an earphone/headphones with your scanner
when operating a motor vehicle or riding a bicycle in or
near traffic. Doing so can create a traffic hazard and
could be illegal in some areas.
when operating a motor vehicle or riding a bicycle in or
near traffic. Doing so can create a traffic hazard and
could be illegal in some areas.
If you use an earphone/headphones with your scanner,
be very careful. Do not listen to a continuous broadcast.
Even though some earphones/headphones let you hear
some outside sounds when listening at normal volume
levels, they still can present a traffic hazard.
be very careful. Do not listen to a continuous broadcast.
Even though some earphones/headphones let you hear
some outside sounds when listening at normal volume
levels, they still can present a traffic hazard.
20-520.fm Page 13 Wednesday, August 4, 1999 3:06 PM