Dell 4320 Projector - Manual (Page 16)

Connecting a Computer Using Wireless
NOTE: Your computer should be equipped with a wireless connector and
properly configured to detect another wireless connection. Refer to your
computer’s documentation on how to configure a wireless connection.
NOTE: Your projector must be installed with a wireless dongle if you want to
use the wireless networking. Refer to "Wireless Networking Installation" on
page 57.
Connecting Your Projector 16