Huawei ETS2028 User Manual page 7

Before cleaning FWT, please turn off the FWT, and then
disconnect the power supply and take out the battery. Before
moving FWT, please disconnect the external power supply.
Do not subject your FWT, battery, and power adapter to
serious collision or shock. Otherwise, battery leakage, FWT
malfunction, overheats, fire, or explosion may result.
Do not place sharp metal objects such as pins near the
earpiece. The earpiece may attract these objects and hurt you
when you are using the FWT.
Do not place the FWT in the area over the air bag or in the air
bag deployment area. Otherwise, the FWT may hurt you
owing to the strong force when the air bag inflates.
Put your FWT, battery, and power adapter in places beyond
the reach of children. Do not allow children to use the FWT,
battery, or power adapter without guidance.
Do not touch the antenna when a call is going on. Touching
the antenna may affect call quality and cause the FWT to
operate at a power level higher than needed.
The network signal condition will directly affect the quality and
stability of the call. Consequently, you should place FWT in a
place where it can receive network signal well. Do not put
FWT in a building with an iron or metal roof. The distance
between FWT and other metal materials (such as metal
brackets or metal doors and windows) should be greater than
25cm and the distance between FWTs should be greater than
30cm.
Do not open the chassis in any case and the device should be
maintained by a qualified maintenance department.
Without permission, you are not allowed to modify the
architecture and security design of FWT. You must bear any
consequence resulted from the operation without permission
Your FWT is designed to conform to the authoritative
international radio frequency (RF) specifications. Use FWT
accessories approved by Huawei only.
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