Dell M318WL User Manual page 21

8 Select Extend to share your content.
NOTE:
Your computer should be equipped with wireless functionality
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 display. The wireless dongle is not shipped
with your projector. You can purchase it on the Dell website at
www.dell.com.
Using Your Projector 21