Enhance your online account security with the FIDO2 U2F Security Key from Key-ID, a compact USB token providing strong two-factor authentication without the need for SMS or phone calls. Compatible with Windows, MacOS, Linux, and Chromebook, it works out of the box with Chrome, Opera, and other FIDO-compliant browsers for seamless login experiences.Key Features: Physical second-factor authentication to secure user logins Eliminates the need for SMS codes or phone-based verification Works with major online services supporting FIDO2/U2F: Google, Dropbox, GitHub, Microsoft login (Windows 10 / Azure AD) Defeats phishing and man-in-the-middle attacks by verifying message origins No drivers or additional software required Includes key ring loop for easy carrying Compact dimensions: 22.0mm x 14.5mm x 7.0mm Lightweight at 4.5 grams Technical Details: Supports CTAP2 extensions needed for Microsoft FIDO2 login Fully compliant with FIDO Alliance standards for secure authentication Product weight: 4.5g / 0.2oz Product dimensions: 22.0mm x 14.5mm x 7.0mm (0.9" x 0.6" x 0.3") Learn how to set up two-factor authentication on your Adafruit account and other services with this helpful security token.