Introduction
The Thetis Pro FIDO2 Security Key with PinPlex is a multi-factor authentication device designed to enhance your online security. It supports FIDO2, U2F, PIV, TOTP, and HOTP protocols, offering a robust defense against phishing, hacking, and cyber scams. This key features dual USB-A and USB-C connectors for broad compatibility, along with NFC for mobile device connectivity. Its durable design includes a 360° rotating metal cover, making it water and crush resistant.
This manual provides detailed instructions for setting up, operating, maintaining, and troubleshooting your Thetis Pro FIDO2 Security Key.

Image: The Thetis Pro FIDO2 Security Key, showcasing its compact design and dual USB connectors.
Setup
Before using your Thetis Pro FIDO2 Security Key, ensure your device and accounts are configured for multi-factor authentication (MFA) or FIDO2/Passkey support.
1. Initial Connection
The security key is equipped with both USB-A and USB-C connectors for versatile compatibility. Simply plug the appropriate connector into your computer or mobile device.

Image: The Thetis Pro FIDO2 Security Key featuring dual USB-A and USB-C ports for broad device compatibility.
2. Software Installation (Optional)
For advanced features like HOTP and certain PIV functionalities, the Thetis Key Management Tool for Windows may be required. Visit www.thetis.io/start for download and installation instructions.
3. Account Registration
Follow the instructions provided by your online service (e.g., Google, Microsoft, Amazon) to register your Thetis Pro FIDO2 Security Key as a security method. This typically involves navigating to your account's security settings and selecting 'Add a security key' or 'Set up Passkey'.
Operating Instructions
1. FIDO2/Passkey Authentication
When prompted by a FIDO2-compatible service, insert your security key and touch the sensor on the key (if applicable) to confirm your identity. This provides a passwordless login experience.

Image: The Thetis Pro FIDO2 Security Key is compatible with a wide range of online services supporting FIDO/Passkey authentication.
2. PinPlex Enabled Passkeys
The PinPlex feature allows for enhanced security by requiring a complex PIN. When setting up a passkey with PinPlex, you will define a PIN according to the following rules:
- Numeric-Only PIN Rules:
- Minimum Length: Must be at least 6 digits long.
- Prohibited Patterns: Avoid sequential (e.g., 123456), repeated (e.g., 111111), or palindromic (e.g., 321123) patterns.
- Limit on Repeating Digits: No more than 3 of the same digit (e.g., 111123 is not allowed).
- Alphanumeric PIN Rules:
- Minimum Length: Must be at least 6 characters long.
- Exemption: No restrictions like numeric PINs; can use any combination of letters and numbers.

Image: PinPlex PIN rules for enhanced security, detailing requirements for numeric and alphanumeric PINs.
3. NFC Connectivity
For mobile devices, the key supports NFC (Near Field Communication). To activate NFC, unfold both USB ports to form a 'T' shape. Then, tap the key against the NFC reader on your mobile device when prompted for authentication.

Image: Using the Thetis Pro FIDO2 Security Key for NFC authentication with a mobile device.
4. TOTP/HOTP Authentication
The key can generate Time-based One-Time Passwords (TOTP) and HMAC-based One-Time Passwords (HOTP). This functionality often requires the Thetis Key Management Tool for Windows to configure and manage the secret keys.

Image: Multi-Factor Authentication process using HOTP with the Thetis security key.
5. Smart Card Functionality (PIV)
The Thetis Pro FIDO2 Security Key is PIV certified, enabling smart card functionality for secure login to PCs, Macs, iPhones, and Android devices via USB-C. This allows for advanced identity verification and digital signature capabilities.

Image: The Thetis Pro FIDO2 Security Key providing smart card functionality for secure login on a laptop.
Maintenance
1. Cleaning
To clean your security key, gently wipe it with a soft, dry cloth. Avoid using harsh chemicals or abrasive materials, as these can damage the device.
2. Storage and Durability
The Thetis Pro FIDO2 Security Key features a durable 360° rotating metal cover that protects the USB connectors. It is designed to be water and crush resistant for daily use. For added protection and ease of carrying, utilize the provided aluminum shield and carrying case.

Image: The Thetis Pro FIDO2 Security Key with its aluminum shield and carrying case for protection and portability.
Troubleshooting
1. Key Not Recognized
- Ensure the key is fully inserted into the USB port.
- Try a different USB port on your device.
- Restart your computer or mobile device.
- Verify that your operating system (Windows, macOS, Linux, Chrome OS) is up to date.
2. Authentication Failure
- FIDO2/Passkey: Confirm that the online service you are trying to access supports FIDO2 or Passkeys. Some services may have specific compatibility requirements (e.g., Windows Hello Login only supported on Windows Enterprise with Entra ID).
- PinPlex: Ensure you are entering the correct PIN and that it adheres to the PinPlex rules established during setup.
- NFC: Make sure both USB ports are unfolded to activate NFC, and that you are tapping the key correctly against your mobile device's NFC reader.
- TOTP/HOTP: Verify that the Thetis Key Management Tool is correctly configured and synchronized.
3. PIV Certificate Issues
If you encounter issues with PIV certificates, ensure you have the necessary software or drivers installed. Refer to the Thetis support website for specific guidance on PIV certificate management.
Specifications
| Feature | Detail |
|---|---|
| Brand | Thetis |
| Model Name | Thetis Pro Fido2 Security Key with PinPlex |
| Model Number | MB000497 |
| Hardware Interface | USB (USB-A, USB-C) |
| Connectivity Technology | NFC, USB |
| Special Features | Compatible PinPlex and PIV, Dual USB Connector, Lightweight |
| Compatible Devices | Windows, MacOS, Linux, Chrome OS, iPhone, Android |
| Product Dimensions | 71P x 18l x 13H millimeters |
| Item Weight | 1 Ounce |
| Color | Black |
| GTIN/UPC | 850065774022 |
Warranty and Support
Warranty Information
For detailed warranty information regarding your Thetis Pro FIDO2 Security Key, please refer to the official Thetis website or the documentation included with your purchase. Warranty terms may vary by region.
Customer Support
If you require further assistance, technical support, or have questions not covered in this manual, please visit the official Thetis support website:
The Thetis support team can provide up-to-date information and solutions for any issues you may encounter.