Headphones And Speakers - Radio Shack Pro-164 Manual

.(neither.
TM
If.you.use.an.external.power.source.for.
regular.operation,.install.alkaline.batteries.for.
emergencies..Rechargeable.batteries.will.self-
discharge,.even.when.not.used,.and.could.have.
no.usable.power..
Caution: You.must.use.a.Class.2.power.source.
that.supplies.9V.DC.and.delivers.at.least..
400.mA..Its.center.tip.must.be.set.to.positive.
and its plug must fit the scanner's PWR DC 9V.
jack..Using.an.adaptor.that.does.not.meet.these.
specifications could damage the scanner or the
adaptor.

Headphones and Speakers

You can plug headphones or an amplified
speaker.(neither.included).into.your.scanner's.
headphone.jack..This.automatically.mutes.the.
scanner's.speaker..
Even.though.some.earphones/headphones.let.
you.hear.some.outside.sounds.when.listening.
at.normal.volume.levels,.they.still.can.present.a.
traffic hazard.
To.protect.your.hearing,.follow.these.earphone.
or.headphones.guidelines:
•. Do.not.listen.at.extremely.high.volume.
levels..Extended.high-volume.listening.can.
lead.to.permanent.hearing.loss.
•. Set.the.volume.to.the.lowest.setting.before.
listening..Turn.on.the.scanner,.and.adjust.
the.volume.to.a.comfortable.level.
•. After.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.