D-Link AC1900 User Manual page 121

Section 6- Connecting a Wireless Client
To connect to the SSID, click Connect.
To automatically connect with the router when your device next detects the
SSID, click the check box.
You will then be prompted to enter the Wi-Fi password (network security key)
for the wireless network. Enter the password into the box and click to
connect to the network. Your computer will now automatically connect to this
wireless network when it is detected.
You can also use Wi-Fi Protected Setup (WPS) to connect to the router.
Press the WPS button on your D-Link device and you will be automatically
connected.
D-Link DIR-878 User Manual 117