Huawei SmartAX MT882 User Manual page 4

Operating Requirements:
Do no let a child operate the device without guidance.
Do not let a child play with the device or any accessory. Swallowing
the accessories may lead to peril.
Use the accessories provided or authorized by the manufacturer
only.
The power supply of the device shall meet the requirements of the
input voltage of the device.
Before plugging or unplugging any cable, shut down the device and
disconnect it from the power supply.
While plugging or unplugging any cable, make sure that your hands
are completely dry.
Do not tread on, pull or over-bend any cable. Otherwise, the cable
may be damaged, leading to malfunction of the device.
Do not use an old or a damaged power cable.
During lightning weather, stop using the device and disconnect it
from the power supply. Unplug the power plug and the ADSL twisted
pair, to avoid lightning strike.
If the device is not used for a long time, disconnect it from the power
supply and unplug the power plug.
In any of the following cases, stop using the device, disconnect it
from the power supply and unplug the power plug immediately:
there is smoke emitted from the device, or there is some abnormal
noise or smell. Contact the specified maintenance center for repair.
Avoid any object (such as metal shavings) from entering the device
from the heat dissipation intakes.
Do not scratch or abrade the shell of the device. This may lead to
malfunctions of the device. The shed painting material may also
lead to skin allergy.
Cleaning Requirements:
Before cleaning the device, stop using it and disconnect it from the
power supply.
Use a piece of soft cloth to clean the device.