Thetis MB000476 FIDO2 Security Key with USB-A, NFC and TOTP/HOTP

Use a physical security key to sign in to supported accounts on a computer, or use NFC with a compatible mobile phone. The Thetis Pro-A combines USB-A and NFC with FIDO2 passkey authentication and TOTP/HOTP codes, giving you more than one way to add an extra layer of account protection.

Choose the connection that suits the device in front of you: plug in the USB-A key on a compatible computer, or use NFC on a compatible phone. It is designed for use with services including Gmail, Facebook, GitHub and Dropbox, the service must support hardware security keys.

Worth noting

FIDO2 enables passwordless sign-in on supported platforms, while TOTP/HOTP authentication provides another method for added protection. That makes the key useful for securing everyday accounts as well as work logins, without relying on a battery or network connection. Support for hardware keys varies by service, so check that the account you want to protect offers this sign-in option.

The USB-A connection suits devices with a matching port, NFC offers a practical alternative when using a compatible phone. The key has a 360° rotating metal cover and a compact, lightweight design that can attach to a keyring. Buyers highlight straightforward setup and successful use with services such as Google and Microsoft, while compatibility experiences are mixed. For a real-world routine, it can be used to authenticate an email login on a computer, then kept with your keys for access on the go.

Quick sizing guide

At 45D x 16W x 9H millimetres and 0.3 ounces, the key is small enough to carry on a keyring. Its USB-A connector is intended for a matching port, while NFC is the alternative for compatible mobile devices. If you are choosing between a portable key and a separate code-based authenticator, this model brings USB-A, NFC and TOTP/HOTP authentication together in one device.

Who it’s for

This key is suited to people who want a physical sign-in method for supported online accounts, and to small businesses looking to add hardware-based authentication to account access. It supports Windows, macOS, Linux and Chrome OS, with USB-A and NFC connectivity for use across compatible devices. The listed services include Gmail, Facebook, GitHub and Dropbox, making it a practical choice for protecting a mix of personal and work accounts. It makes sense if you want a compact key that offers both FIDO2 passkey sign-in and TOTP/HOTP authentication.

What to clarify

Can it be used with any online account? No: the service needs to support hardware security keys. The product lists Gmail, Facebook, GitHub and Dropbox among compatible services, and support can differ between platforms.

How does it connect? It has a USB-A interface and NFC. Use the option supported by your device and the service you are signing in to.

Does it need a battery or network connection? No. The key is designed to work without either, so authentication does not depend on charging or a network connection.

Is it worth it?

The Thetis Pro-A brings together FIDO2 passkey sign-in, TOTP/HOTP authentication and two connection options in a compact key. For anyone securing supported accounts across compatible computers and phones, that combination offers a straightforward way to carry an additional authentication method wherever they go.