Nokia N97 - Manual (Page 15)

Warning:
When you use the headset, your ability to hear outside
sounds may be affected. Do not use the headset where it can
endanger your safety.
Do not connect products that create an output signal as this
may cause damage to the device. Do not connect any voltage
source to the Nokia AV Connector.
When connecting any external device or any headset, other
than those approved by Nokia for use with this device, to the
Nokia AV Connector, pay special attention to volume levels.
Attach a wrist strap
Thread the wrist strap, and tighten it.
Touch screen actions
Use the touch screen with your finger or with a stylus (if
available).
Important: Use only a stylus approved by Nokia for use
with this device. Using any other stylus may invalidate any
warranty applying to the device and may damage the touch
screen. Avoid scratching the touch screen. Never use an actual
pen or pencil or other sharp objects to write on the touch
screen.
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