Huawei U8100 User Guide - Manual (Page 168)

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Appendix
Prevention of Hearing Damage
Using a headset at high volume can damage your hearing. To
reduce the risk of damage to hearing, lower the headset volume
to a safe and comfortable level.
Safety of Children
Comply with all precautions with regard to children's safety.
Letting the child play with your device or its accessories, which
may include parts that can be detached from the device, may be
dangerous, as it may present a choking hazard. Ensure that
small children are kept away from the device and accessories.
Accessories
Use the accessories delivered only by the manufacturer. Using
accessories of other manufacturers or vendors with this device
model may invalidate any approval or warranty applicable to the
device, result in the non-operation of the device, and cause
danger.
Battery and Charger
• Unplug the charger from the electrical plug and the device
when not in use.