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FIDO2 Security Key [Folding Design] Thetis Universal Two Factor Authentication USB (Type A) for Multi-Layered Protection (HOTP) in Windows/Linux/Mac OS,Gmail,Facebook,Dropbox,SalesForce,GitHub
Thetis

FIDO2 Security Key Thetis Universal Two Factor Authentication USB (Type A)

Bottom line: The FIDO2 Security Key Thetis Universal Two Factor Authentication USB ($25.68 on Amazon as of 2026-10-07): FIDO2 certified with U2F backward compatibility for older 2FA sites; main trade-off: FIDO2 does not support Mac log-in at all.

$25.68

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Buy on Amazon — $25.68 Compare to similar accessories

By , Founder & Editor-in-Chief · Listing data updated

Mike Perry — Hardware researcher since 2014, focused on GPU performance across gaming, rendering, and local-LLM inference. Synthesises community benchmarks, manufacturer specs, and public forum data into actionable buying guides.

*Price sourced from Amazon.com. Last updated 2026-10-07. Price and availability subject to change.

Pros & Cons

Pros

  • ✓ FIDO2 certified with U2F backward compatibility for older 2FA sites
  • ✓ Built-in HOTP one-time-password adds a second factor beyond FIDO2
  • ✓ Rotating aluminum alloy cover shields the USB-A connector when idle
  • ✓ Works on Windows, macOS, and Linux via current Chrome

Cons

  • ✗ FIDO2 does not support Mac log-in at all
  • ✗ Windows Hello log-in needs enterprise Azure Active Directory
  • ✗ USB Type-A only - no USB-C, NFC, or Bluetooth option
  • ✗ U2F coverage limited to sites that implement the U2F protocol

Manufacturer description

It is FIDO2 certified and backward compatible with U2F, so it works with current Chrome across all three desktop platforms and on any site that follows the U2F protocol - Gmail, Facebook, Dropbox, Salesforce, and GitHub included. Built-in HOTP one-time-password support adds a second authentication factor on top of the FIDO2 handshake, which means an attacker who phishes your password still cannot reach the account without the physical key in hand. The folding design is the part you will notice daily. A 360-degree rotating aluminum alloy cover swings over the USB connector when the key is…

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SpecPicks Verdict

SpecPicks scored FIDO2 Security Key Thetis Universal Two Factor Authentication USB using a rating × review-volume × price-fit model applied to published specs and reviews across the accessories category. Thetis's accessories lineup sits within the broader category mid-tier; price and specs are the deciding factors over brand loyalty here. Judge it on the specification table and the price rather than on sentiment: check the figures that decide your use case, then put it side-by-side with two or three close alternatives in the Compare tool before clicking through.

Common buyer scenarios for accessories of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the retailer's listing before purchase. Prices and stock are set by the retailer and may have moved since this page was last updated.

Frequently Asked Questions

Does the Thetis FIDO2 key let me log into my Mac?

No. The manufacturer states plainly that FIDO2 does not support Mac log-in. The key does work on macOS for web-based 2FA through current Chrome, so Gmail, GitHub, and Dropbox sign-ins are covered - just not the macOS system log-in itself.

Can I use this for Windows Hello sign-in?

Only if you are an enterprise user on Azure Active Directory. Thetis restricts Windows Hello log-in via this key to Azure AD accounts, so a personal or local Windows account will not work for system log-in.

Which websites does it actually work with?

Thetis lists Gmail, Facebook, Dropbox, Salesforce, and GitHub. Beyond those, the key is backward compatible with U2F, so any site implementing the U2F protocol is supported through the newest Chrome browser.

What connector does it use, and will it fit my laptop?

It is USB Type-A only. If your machine has just USB-C ports you will need an adapter or hub - there is no USB-C, NFC, or Bluetooth version of this particular model.

Is it durable enough for everyday keychain use?

That is the design intent. A 360-degree rotating aluminum alloy cover folds over the USB connector when not in use, protecting the contacts from wear, drops, and scratches.

Key Features

  • Passwordless World - A revolutionary new way to protect your account info. By being FIDO2 certified by the world’s largest ecosystem for standard-based, interoperable authentication, FIDO2 makes everyday log-in experience effortless and passwordless yet more secure than generic password style security. **Note: FIDO2 does NOT support Mac log-in.
  • Online Account Protection - FIDO2 key is backward compatible with U2F protocol and works with the newest Chrome browser with operating systems such as: Windows, macOS, or Linux. U2F can be supported and protected on all websites that follow U2F protocols.
  • Multi-factored Authentication - Built-in, advanced HOTP (One Time Password) technology that completes the unique multi-factored authentication process. Eliminate worry and help prevent losing your account info to theft, phishing, hacking, or other online scams. Note: Only Enterprise Users using Azure Active Directory can access Windows Hello log-in via Thetis FIDO2 Security Key.
  • Compact And Durable - 360° design with rotating aluminum alloy cover that shields the USB connector when not in use. Tough and durable alloy protects FIDO2 key from daily wear-and-tear, accidental drops, and scratches.
  • Portable Design - ultra-portable design allows you to take your FIDO key anywhere you need it.

Full Specifications

BrandThetis
Colorblack
Model NameThetis FIDO2 Security Key
Read Speed480 bytes_per_second
Unit Count1 Count
Write Speed480 bytes_per_second
ConnectivityUSB
Model NumberMB000368
CompatibilityMac, Linux
Item Type NameFIDO2 Seucrity Key
Mfr Part NumberMB000368
Special FeatureFIDO2 Certified
Flash Memory TypeUSB
Compatible DevicesWindows, MacOS or Linux
Hardware InterfaceUSB
Additional FeaturesFIDO2 Certified
Warranty DescriptionStandard Express Warranty
Compatible Phone ModelsWindows, Mac OS X, Linux (Debian Based or Red Hat Based) and Chrome OS
Connectivity TechnologyUSB
Item Dimensions D x W x H0.39"D x 0.59"W x 1.73"H
Full listing titleFIDO2 Security Key [Folding Design] Thetis Universal Two Factor Authentication USB (Type A) for Multi-Layered Protection (HOTP) in Windows/Linux/Mac OS,Gmail,Facebook,Dropbox,SalesForce,GitHub

Ready to buy?

FIDO2 Security Key [Folding Design] Thetis Universal Two Factor Authentication USB (Type A) for Multi-Layered Protection (HOTP) in Windows/Linux/Mac OS,Gmail,Facebook,Dropbox,SalesForce,GitHub is listed on Amazon. Price, availability, shipping and returns are set by Amazon and its sellers — check the listing for current terms. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.

Buy on Amazon — $25.68

*Price sourced from Amazon.com. Last updated 2026-10-07. Price and availability subject to change.

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FIDO2 Security Key [Folding Design] Thetis Universal Two Factor Authentication USB (Type A) for Multi-Layered Protection (HOTP) in Windows/Linux/Mac OS,Gmail,Facebook,Dropbox,SalesForce,GitHub
$25.68
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