Sony NWZ-A829 Marketing Specifications (Black Model) Operation Manual page 148

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Additional Information
On heat build‑up
Heat may build up in the player while charging if it is used for an extended
period of time.
On the headphones
Road safety
Avoid listening with your headphones in situations where hearing must not be
impaired.
Preventing hearing damage
Avoid using the headphones at a high volume. Hearing experts advise against
continuous, loud and extended play. If you experience a ringing in your ears,
reduce the volume or discontinue use.
Do not turn the volume up high all at once, especially when using headphones.
Turn up the volume gradually so that loud sound will not hurt your ears.
Caring for others
Keep the volume at a moderate level. This will allow you to hear outside
sounds and to be considerate to the people around you.
Warning
If there is lightning when you are using the player, take off the headphones
immediately.
If you experience an allergic reaction to the supplied headphones, stop using
them at once and contact a doctor.
On the use
 When using a strap (sold separately), be careful to avoid hooking it on objects
you pass by. Furthermore be careful not to swing the player by the strap to
avoid bumping people.
 Refrain from using the player according to the in-flight announcements
during take off or landing in an aircraft.
 Note that condensation may form temporarily in cases such as when the
player is moved quickly from a low-temperature environment to a high-
temperature environment or used in a room that has a heater just turned on.
Condensation creates a phenomenon where moisture in the air adheres to
surfaces such as metal panels, etc., and then changes to liquid.
If condensation forms in the player, leave it turned off until the condensation
disappears. If you use the player with condensation present, a malfunction
may result.
Continued 