LG TONE Free FP8 UVnano True Wireless In-Ear Headphones (Charcoal Black) - Manual (Page 24)

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3. Potentially explosive atmosphere
Turn off your electronic device when in any area with a potentially
explosive atmosphere. Although this is uncommon, your electronic
device could generate sparks. Sparks in such areas could cause an
explosion or fire resulting in bodily injury or even death. Areas with
a potentially explosive atmosphere are often but not always clearly
marked.
4. Emergency calls
IMPORTANT!
This Bluetooth headset and the electronic device connected to the headset
operate using radio signals and mobile and landline networks as well as
user-programmed functions, which cannot guarantee connection under all
conditions. Therefore, you should never rely solely upon any electronic device
for essential communications (e.g., medical emergencies). Remember, in order
to make or receive calls, the headset and the electronic device connected to
the headset must be switched on and in a service area with adequate mobile
signal strength. Emergency calls may not be possible on all mobile phone
networks or when certain network services and/or phone features are in use.
Check with your local service provider.
5. Battery information
A rechargeable battery has a long service life if treated properly. A new
battery or one that has not been used for a long period of time could
have reduced capacity the first few times it is used.
Do not expose the battery to extreme temperatures, never above
+122°F (+50°C) or below +14°F (-10°C). For maximum battery
capacity, use the battery at room temperature. If the battery is used
in low temperatures, the battery capacity will be reduced. The battery
can only be charged in temperatures between +32°F (0°C) and +113°F
(+45°C).