D-Link AC750 User Manual page 139

Section 4 - Connecting to a Wireless Network
3. Enter the same security key or passphrase (Wi-Fi password) that is on your
router and click Connect.
It may take 20-30 seconds to connect to the wireless network. If the connection
fails, please verify that the security settings are correct. The key or passphrase
must be exactly the same as the one on the wireless router.
D-Link DIR-819 User Manual 135