D-Link RangeBooster G WDA-2320 User Manual page 44

Section 3 - Configuration
Enter the same security key or passphrase that is on your
router and click Connect.
It may take 0-30 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 on the wireless router.
D-Link WDA-30 User Manual 44