VIEWSONIC WPD-100 VS13789 - Manual (Page 31)

ViewSonic WPD-100 25
6. All wireless access points in proximity will be displayed here. If the access
point you want to use is not displayed here, please try to move your
computer closer to the access point, or you can click ‘Refresh network list’
to rescan access points. Click the access point you want to use if it’s shown,
then click ‘Connect’.
7. If the access point is protected by encryption, you have to input its security
key or passphrase here. It must match the encryption setting on the access
point.
If the access point you selected does not use encryption, you’ll not be
prompted for security key or passphrase.