D-Link AC750 User Manual page 46

Section 3 - Configuration
PIN: Select this option to use PIN method. In order to use this
method you must know the wireless client's 8 digit PIN and click
Connect.
PBC: Select this option to use PBC (Push Button) method to add a
wireless client. Click Connect.
Once you click Connect, you will have a 120 second time limit to
apply the settings to your wireless client(s) and successfully establish
a connection.
Click on Cancel to add another wireless device. Click on Wireless
Status to view the Wireless Status screen.
View the Wireless Status screen.
D-Link DIR-818LW User Manual 41