Huawei EchoLife HG521 User Manual page 7

Use the accessories such as the power adaptor provided or authorized only by the
manufacturer.
Make sure that the device does not get wet. If water gets into the device, disconnect
the power supply immediately and unplug all the cables connected to the device.
The power supply of the device must meet the requirements of the input voltage of
the device.
Before plugging or unplugging any cable, shut down the device and disconnect the
power supply.
While plugging or unplugging any cable, make sure that your hands are dry.
Do not step on, pull, or stretch any cable. Otherwise, the cable may get damaged,
leading to malfunction of the device.
Do not use old or damaged cables.
Keep the power plug clean and dry, to prevent electric shock or other dangers.
During lightning, disconnect the device from the power supply and unplug all the
cables connected to the device, such as the power cable, telephone cable, and RF
cable, to prevent lightning strike.
If the device is not used for a long time, disconnect the power supply and unplug the
all the cables connected to the device.
If smoke, sound, or smell is emitted from the device, stop using the device
immediately, disconnect the power supply, unplug the power supply and other
cables, and remove the batteries. Contact the authorized maintenance center for
repair.
Make sure that no object (such as metal shavings) enters the device through the heat
dissipation vent.
Do not scratch or abrade the shell of the device. The shed painting may lead to skin
allergy or malfunctions of the device. If the shed painting material drops into the
host, a short circuit may occur.
Cleaning Requirements
Before cleaning the device, stop using it, disconnect the power supply, and unplug
all the cables connected to the device.
Do not clean the device cover with any cleaning solution or cleanser spray. Use a
piece of soft cloth to clean the device cover.
Wireless Product Usage Requirements
Keep the device away from magnetic storage devices (e.g., a magnetic card or a
floppy disk), to prevent loss of the stored information.
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