TL-WDN3800 N600 Wireless Dual Band PCI Express Adapter User Guide
Figure 3-22
3.If the network you would like to connect is security-enabled, enter the same security key or passphrase that is on your Router. If the network to be connected is not secure, the connection will be built without entering a key.
N600 Wireless Dual Band PCI Express Adapter User Guide 
