Huawei EchoLife WS311 User Manual page 9

Reorient or relocate the receiving antenna.
Increase the separation between the equipment and receiver.
Connect the equipment into an outlet on a circuit different from that to which the
receiver is connected.
Consult the dealer or an experienced radio/TV technician for help.
Changes or modifications made to this equipment not expressly approved by Huawei
Technologies Co., Ltd. may void the FCC authorization to operate this equipment.
After the WS311 is used for a certain period of time, the cover gets
heated, which does not affect the functioning of the WS311.
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