Traffic Safety - Radio Shack DX-397 Owner's Manual

Traffic Safety

Do not use an earphone or headphones with your receiver 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 or headphones with your receiver, be very
careful. Do not listen to a continuous broadcast. Even though some
earphones or headphones let you hear some outside sounds when
listening at normal volume levels, they still can present a traffic haz-
ard.
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