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• Keep the ambient temperature between 0°C and 45°C while the device
is being charged. Keep the ambient temperature between –10°C to
55°C for using the device powered by a battery.
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
Choose only batteries, chargers, and accessories approved for use with
this model by the device manufacturer. The use of any other type of battery,
charger, or accessory may invalidate any warranty for the device, may be in
violation of local rules or laws, and may be dangerous. Please contact your
dealer for information about the availability of approved batteries, chargers,
and accessories in your area.
Battery and Charger
• Unplug the charger from the electrical plug and the device when not in
use.
• The battery can be charged and discharged hundreds of times before it
eventually wears out. When the standby time and the talk time are
shorter than the normal time, replace the battery.
• Use the AC power supply defined in the specifications of the charger. An
improper power voltage may cause a fire or a malfunction of the charger.
• Do not connect two poles of the battery with conductors, such as metal
materials, keys, or jewelries. Otherwise, the battery may be short-
circuited and may cause injuries and burns on your body.
• If battery electrolyte leaks out, ensure that the electrolyte does not touch
your skin and eyes. When the electrolyte touches your skin or splashes
