Most of the systems using FIDO keys for authentication recommend having more than one security key enrolled. This is why we decided to introduce the FIDO bundle, which comes with a pair of T2F2 keys: one (primary, with a red sticker) to keep with you and one (secondary, with a green sticker) to keep in your desk drawer. You add both keys to your account, so you have a backup key if something happens to the primary one.  

Token2 T2F2 security key combines hardware-based authentication, public-key cryptography, HOTP, U2F, and FIDO2 protocols to protect your accounts. This type of security devices provides the highest level of multifactor authentication of user accounts with Twitter, Facebook, Gmail, GitHub, Dropbox, Dashlane, Salesforce, Duo, Centrify and hundreds more HOTP, U2F, and FIDO2 compatible services. No additional tools or applications are required, and the login process is simple and reliable. Just insert the Security Key into a USB-A slot and authenticate with a simple touch.  The T2F2 security key does not require a battery nor network connectivity, so it is always on and accessible.

Token2 T2F2 key is certified by the FIDO® Alliance (Level1 certification)

Specifications

Integration guides

Using Your T2F2 Security Key with Google

Passwordless authentication in Azure AD with Token2 FIDO2 keys

Using FIDO2 USB keys under Linux