Sony HMZ-T2 Reference Manual page 7

Headphone Handling
• If you experience an allergic reaction to the
supplied headphones, stop using them at once
and contact a doctor.
• When you unplug the headphones from the
head mounted unit, make sure to hold the
headphone plug to unplug it. Pulling by the
headphone cord itself may damage it.
• Earbuds may deteriorate after extended use or
storage.
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