Thetis PRO FIDO2 Key MB000493, USB-A/USB-C Security Key with NFC

When signing in to a supported account from a computer or phone, the Thetis PRO FIDO2 Key adds a physical authentication step. It has USB-A and USB-C connectors, plus NFC for mobile authentication. Would one key for those different access methods suit your routine? Its foldable design has a rotating metal cover and needs no battery or network connection.

Practical tips

Use the USB-A or USB-C connector with a compatible computer, or tap the key against a phone’s NFC area when the service supports mobile authentication. NFC is not supported for authentication on macOS or Windows, so it should not be treated as a wireless desktop option. The key is listed for Windows, macOS, Linux, and Chrome OS, but actual support depends on the operating system, browser, account, and sign-in method. Check FIDO2 compatibility for the specific service before buying.

There are also specific exceptions in the product information: ID Austria is not supported because it requires FIDO2 Level 2. Windows Hello sign-in works only with Windows Enterprise editions that support Entra ID. The product notes compatibility with the web version of Bank of America’s system, not its app-based version. These details matter if you are buying the key for one particular account rather than general use.

Why it makes sense

The main practical difference from a basic USB-only security key is flexibility: this model offers both USB-A and USB-C, along with NFC for supported phone-based authentication. That can suit a household or work setup where devices have different ports, without needing a battery or network connection. The listed 50 passkey slots and 50 OATH slots may also matter if you plan to manage multiple credentials with supported services and tools.

Buyers describe positive experiences using the key with Windows Hello and cloud services, and appreciate the connector options. Feedback on compatibility and construction is more mixed, including reports of USB-C-end damage. Those reports are individual experiences, not a guarantee of how a particular unit will hold up. A solid pick if your accounts support FIDO2 and you want one key for USB-A, USB-C, and mobile NFC use. Better avoided if you need ID Austria support or expect NFC authentication on a computer.

Specifications

• Name: Thetis PRO FIDO2 Key (flip-x)
• Model: MB000493
• Type: FIDO2 security key with HOTP support
• Connectivity: USB-A, USB-C, and NFC for mobile authentication
• Design: Foldable, with a rotating metal cover
• Passkey slots: 50
• OATH slots: 50
• Color: Black
• Dimensions: 2.9" D x 0.72" W x 0.5" H
• Weight: 1 ounce
• Compatibility listed: Windows, macOS, Linux, and Chrome OS

Is it worth it?

This key makes the most sense when its port mix matches the devices you use and the accounts you want to protect support its authentication methods. Compared with a simpler USB-only key, it adds NFC for supported mobile sign-ins, compared with relying on a phone alone, it provides a separate physical key for authentication. Its usefulness is still service-dependent, and the stated Windows Hello and ID Austria restrictions are important selection criteria. If your main goal is protection for a specific account, confirm that account’s requirements first, for broader use, the combination of USB-A, USB-C, and mobile NFC offers more ways to connect than a single-connector design.