Edimax Technology QIG-ED-DB-0507-V11 - Manual (Page 10)

WANRING:
If your wireless base stations already have good position, you can only
replace the antenna without the antenna stand. And if the wireless base
stations have bad positions, where the signals may be blocked, just try
to connect alone with the antenna stand to pick up better signals.
PCI adaptor for desktop PC
Normally the host of your desktop PC will be remained underneath the desk or
just next to the walls and partitions; such deployments might block wireless
signal routes and sometimes cause unsatisfied link quality. The external
antenna with 1meter extensible cable which generates omni directional signals,
you can set up the antenna to where the antenna can “see” the wireless base
station, which is to pick up the better connections and link quality.
QIG-ED-DB-0507-V1 10