Edimax EW-7108PCg User Manual page 59

Click 'QoS' tab, and the following settings will appear:
Here are descriptions of every setup items:
WMM Enable
WMM - Power
Save Enable
Check this box to enable WMM function. Please
click 'Apply' button on the right of this check box
after you check or uncheck this box, so
corresponding settings in this window will be
activated or deactivated respectively.
Enable WMM power saving mode to save
energy
and lets your battery live longer.
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