68 Chapter 5 Last, but Not Least
MagSafe power specications:
ÂFrequency:50to60Hz,singlephase
ÂLine Voltage:100to240V
ÂOutput Voltage:18.5VDC,4.6A
Hearing damagePermanenthearinglossmayoccurifearbudsorheadphonesare
usedathighvolume.Youcanadaptovertimetoahighervolumeofsoundthatmay
soundnormalbutcanbedamagingtoyourhearing.Ifyouexperienceringinginyour
earsormuedspeech,stoplisteningandhaveyourhearingchecked.Thelouderthe
volume,thelesstimeisrequiredbeforeyourhearingcouldbeaected.Hearingexperts
suggestthattoprotectyourhearing:
ÂLimittheamountoftimeyouuseearbudsorheadphonesathighvolume.
ÂAvoidturningupthevolumetoblockoutnoisysurroundings.
ÂTurnthevolumedownifyoucan’thearpeoplespeakingnearyou.
High-risk activitiesThiscomputersystemisnotintendedforuseintheoperation
ofnuclearfacilities,aircraftnavigationorcommunicationssystems,airtraccontrol
systems,orforanyotheruseswherethefailureofthecomputersystemcouldleadto
death,personalinjury,orsevereenvironmentaldamage.