Huawei B681 Network Router User Manual


 
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aircraft and disrupt the wireless telephone network. It may also be considered
illegal.
Operating Environment
Do not use or charge the device in dusty, damp, and dirty places or places with
magnetic fields. Otherwise, it may result in a malfunction of the circuit.
While using the device, observe the local laws and regulations, and respect
others' privacy and legal rights.
Place the device or accessories in well-ventilated, cool, and out-of-direct-
sunlight place. Avoid enveloping the device, or covering towels and placing
articles on the device. Place the device out of a box or case to avoid poor heat
dissipation that results in the damage to the device.
On a stormy day with thunder, do not use your device, to prevent any danger
caused by lightning.
Keep the ambient temperature between 0°C to 45°C for using the device.
This device should be installed and operated with a minimum distance of 20 cm
between the antenna and all persons.
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.
Charger
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.
If the power cable is damaged (for example, the cord is exposed or broken), or
the plug loosens, stop using the cable at once. Otherwise, it may lead to an
electric shock, a short circuit of the charger, or a fire.
Cleaning and Maintenance
It is normal that your wireless device gets hot when you use or charge it. Before
you clean or maintain the wireless device, stop all applications and disconnect the
wireless device from your PC.
Use your wireless device and accessories with care and in a clean environment.
Keep the wireless device away from a fire or a lit cigarette.
Protect your wireless device and accessories from water and vapor, and keep
them dry.