Edimax Technology EW-7733UnD - Manual (Page 42)

In this page, you can configure WEP / WPA passphrase (password).
For WEP:
Select default Tx Key (normally you can just use Key 1), Key Format (Hex
characters or ASCII characters), and input WEP key.
If you select Hex key format, input 10 or 26 characters (number 0-9 and
alphabets A-F); if you select ASCII, input 5 or 13 characters (number 0-9 and
alphabets).
For WPA-PSA / WPA2-PSK: