Huawei ES8100 Manual page 82

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.
The device complies with the RF specifications when the

device is used near your ear or at a distance of 1.5 cm from
your body. Ensure that the device accessories such as a
device case and a device holster are not composed of metal
components. Keep your device 1.5 cm away from your body
to meet the requirement earlier mentioned.
On a stormy day with thunder, do not use your device when

it is being charged, to prevent any danger caused by
lightning.
When you are on a call, do not touch the antenna. Touching

the antenna affects the call quality and results in increase in
power consumption. As a result, the talk time and the
standby time are reduced.
While using the device, observe the local laws and

regulations, and respect others' privacy and legal rights.
Keep the ambient temperature between 0°C and 40°C while

the device is being charged. Keep the ambient temperature
between 0°C to 40°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.
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