Apple Nike + iPod Sensor - Manual (Page 27)

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Avoid hearing damage Permanent hearing loss
may occur if earphones are used at high volume.
Set the volume to a safe level. 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 muffled
speech, stop listening and have your hearing
checked. The louder the volume, the less time is
required before your hearing could be affected.
Hearing experts suggest that to protect your
hearing:
Limit the amount of time you use the earphones В В
at high volume.
Avoid turning up the volume to block out noisy
В В
surroundings.
Turn down the volume if you can’t hear people
В В
speaking near you
Disassembling the sensor Do not attempt to
open the sensor, disassemble it, or remove the
battery. No user-serviceable parts are inside.
Do not use the receiver, iPhone, or iPod in or near
water or wet locations.