Time Based One-Time passwords requires downloading an OATH application onto your smartphone or tablet, and optionally a bar-code reader. Once activated a pop-up screen will present a QR code, with optional manual code to enter into your smartphone or tablet.
Once scanned or entered, a time based one time password will appear within your OATH application providing the second form of verification used to log in.
Additionally, a backup code is presented which should be stored in the event that your smartphone or tablet is not accessible and you wish to gain access to the secure Client Area.