Edimax Technology QIG-ED-DB-0507-V11 - Manual (Page 7)

Ceiling mount
The special ceiling mount feature is mainly recommended to be used when
your wireless base stations are hidden over the ceiling or some kind of
anti-theft protection cases. So that your base stations are ‘invisible’ and
signals can still be effectively transmitted through the external antenna.
How to set up a ceiling mount with your antenna base –
Try to press-and-pull the antenna bottom cover with your forefinger,
simultaneously; use your thumb at the same time to push up the antenna
bottom cover from the end.
QIG-ED-DB-0507-V1 7